P0455 ford

How To Fix and Clear OBD-II Trouble Code P0455?

OBD-II P0455 Trouble Code

Evaporative Emissions System Malfunction - Gross (Large) Leak Detected

Here is what P0455 means, in simple terms...

P0455 is a fairly straight forward OBD-II trouble code, in that it tells us that the engine computer has detected a large leak in the engine Evaporative Emissions Control (EVAP) system. The EVAP system prevents fuel vapors from escaping into the atmosphere. The system allows for fuel vapors from the gas tank to be absorbed by charcoal pellets located in the charcoal canister (also known as EVAP Canister), and to be released to the engine air intake manifold at a later time. The system is controlled by the engine control module (ECM) via a vent control and purge control valve. The vent control valve, when open, lets fresh air into the charcoal canister, purging the canister of fuel vapors and directing them to the intake manifold to be burned along side the engine's regular air/fuel mixture. Prior to the mandatory installation of engine EVAP systems in 1976, these harmful fuel vapors were released into the atmosphere.

What caused my vehicle to trigger a P0455 trouble code?

The ECM performs fuel vapor leak tests to ensure the EVAP system is functioning properly. The test occurs while your vehicle is being driven and also when your vehicle is parked (engine off). During the vapor leak test, the ECM commands the vent and purge control valves to close. The ECM then monitors the system for pressure/vacuum loss. If the ECM detects a leak, it records a trouble code. Large EVAP vapor leaks are recorded as trouble code P0455, while small leaks are recorded as trouble code P0456. Here are possible engine faults which may cause a P0455 trouble code to be recorded by the ECM (Listed in the order of expense to repair):

  • Gas cap left open or not closed tight enough
  • Defective gas cap (cracked) or damaged gas cap seal
  • Disconnected or cracked EVAP hose(s)
  • Defective or stuck-open vent control valve/solenoid
  • Defective or stuck open purge valve/solenoid
  • Damaged or cracked charcoal EVAP canister

What symptoms will my vehicle experience when trouble code P0455?

A P0455 trouble code will generally trigger the check engine light on. Depending on your vehicle's make, the check engine light may be referred to as the CEL, the Malfunction Indicator Lamp (MIL) or Service Engine Soon (SES) light. Freeze frame data containing information regarding engine sensor values at the time the ECM detected the P0455 fault will also be stored in the ECM's ROM memory and can be accessed via an OBD-II scan tool. Freeze frame data may be helpful to a technician when diagnosing the root cause of a P0455 trouble code when the fault is not easy to find.

  • Check engine light on
  • Fuel smell near gas tank filler neck, gas cap, engine compartment, and/or near charcoal canister
  • Decreased fuel economy
  • Incomplete EVAP system monitor

How can I fix a P0455 problem and where should I start?

First thing first... ensure your vehicle's gas cap is properly sealed. Make sure when closing the cap you hear the right number of clicks. If you found the gas cap to be loose or the gas cap's seal to be broken/brittle, then more than likely your problem is solved. Replace the cap with a new one or tighten the cap, depending on the problem you found, then drive your vehicle for the next few days as normal. The check engine light should turn off on its own and the trouble code erase from memory after a few drive cycles. A drive cycle is typically considered one full engine on and engine off cycle where the vehicle is driven for at least 30 miles and then parked for at least 8 hours. If you have access to a OBD-II scan tool, you can manually turn off the check engine light (erase the P0455 trouble code) and see if the check engine light will turn back on (over the course of a week or so of driving).

Should you find that the gas cap was tight and the seal appear to be in good condition, further diagnosis will be required. You will then need to inspect all EVAP hoses leading from the gas tank to the charcoal canister, and from the charcoal canister to the engine air intake (usually the air cleaner assembly). Finding the EVAP hoses may or may not be difficult. If you can locate the EVAP canister (usually near the gas tank), you can follow the hoses leading to the engine compartment and gas tank. Look for breaks and/or disconnections in the lines.

If the EVAP hoses too appear to be in good condition, not loose and not disconnected, the next step will require the use of proper diagnostic tools, and best left to a technician to handle. Typically to find a fuel vapor leak, a smog technician would test the entire EVAP system using an OBD-II scan tool and smoke machine. The smoke machine places smoke in the EVAP system. Leaks can then be visually detected. Diagnosis may also require electrical testing of the purge valve and the vent control valve for proper operation.

  • Check gas cap for proper tightness
  • Check gas cap rubber seal for cracks
  • Check all EVAP hoses leading to and from the charcoal canister and air cleaner assembly
  • Diagnose both the purge and vent control valves/solenoids

Can I drive my vehicle with a P0455 trouble code and illuminated CEL?

You may drive your vehicle while trouble code P0455 is present unless the gas vapor odors are very strong or you see obvious fuel (liquid) leaks. Extreme danger, seek repairs if either of these two scenarios exist. Note, a large fuel vapor leak may cause fuel economy issues. It is best not to ignore the problem, rather investigate the issue(s) as soon as possible.

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Trouble CodeFault LocationProbable Cause
P0455Evaporative emission (EVAP) system -large leak detectedHose connection(s), intake leak, EVAP canister, EVAP canister purge valve

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What Does Code P0455 Mean?

OBD II fault code P0455 is a generic code that is defined as “EVAP System Leak (No Purge Flow or Large Leak) Conditions”, and is set when the PCM (Powertrain Control Module) detects a large leak in the EVAP (Evaporative Emissions Control) system.

NOTE: Note that on Ford applications this code has a dual definition, in the sense that it can either indicate a large leak (as opposed to small leak) in the EVAP system, or a fault, failure, defect, or malfunction in the EVAP system that is preventing the flow of fuel vapors to the engine. Also, note that while this code can occur on any OBD II complaint application, it occurs more commonly on Ford applications than on almost any other application.

The purpose of the EVAP system on all applications is to trap, and contain fuel vapors within the system until engine-operating conditions are such that the trapped vapors can be transported to the engine to be combusted as part of the air/fuel mixture. While design specifics vary, EVAP systems generally consist of the fuel filler cap, the fuel tank, various flow and pressure sensors, purge and vent valves and their associated solenoids that are electronically controlled, a charcoal canister, various pipes, hoses and vacuum lines, and electrical wiring.

When the EVAP system is not in purge mode, both the vent and purge valves are closed, which has the effect of sealing the fuel system off from the atmosphere. As the fuel generates vapors, the vapors are absorbed by the activated charcoal in the charcoal canister until the vapor pressure approaches a predefined limit. When this happens in a fully functional system, the ECU opens both the purge valve and the vent valve to allow engine vacuum to draw the accumulated vapors into the engine. Note that the purpose of opening the vent valve is to allow atmospheric pressure to assist in “pushing” the collected vapors from the charcoal canister.

However, since a fully functional EVAP system is a legal requirement in most jurisdictions, car manufacturers have developed various strategies to detect leaks in the system. One such strategy is to open the purge valve while keeping the vent valve closed while engine vacuum partially evacuates the system. Based on how fast the vacuum decays after the purge valve is closed, the PCM can calculate the size of the leak.

Another strategy involves using a dedicated air pump to pressurize the system (while keeping all valves closed) to a predefined maximum pressure. Based on how fast the pressure drops after the pump is deactivated, the PCM can also calculate the size of the leak. Another strategy involves the Ideal Gas Law, which states that the temperature of a given volume of gas (fuel vapor, in this case) will decrease by a predictable amount when the pressure of the vapor decreases. Based on the change in the vapor’s temperature, the PCM can calculate the size of the leak.

As stated elsewhere, code P0455 can also indicate a condition in which no fuel vapors flow through the system.  In these cases on Ford applications, the most common cause is a defective charcoal canister vent valve that is stuck in the closed position, thus preventing engine vacuum from evacuating the EVAP system. Note though that this condition will almost certainly be indicated by one or more codes that relate directly to the vent valve and/or its control circuit(s).

While the presence of a leak in the EVAP system will generally not affect drivability, a leak will cause code P0455 to be stored and a warning light to be illuminated. Be aware though that if the code indicates a “no EVAP flow” condition (depending on the nature of the problem),  the fuel vapor pressure may build-up to the point where hoses and lines may rupture, which may cause large quantities of fuel to leak from the tank. Note that with either condition, the application may also not pass a compulsory emissions test, because the EVAP monitor will not run or complete.

So why does code P0455 affect Ford applications more than others?

While this code can affect any application, the reason why it occurs more frequently on Ford applications has to do with the location of the charcoal canister and its vent valve. On almost all Ford applications, the canister and valve are located between the rear wheels close to the rear axle, or directly above it, as is the case with Ford trucks. On a few Ford applications, the charcoal canister and vent valve are located in a rear wheel well, which virtually guarantees that water will affect the metal components of the vent valve.

While Ford has made some attempt to protect these components from the elements by enclosing them in plastic covers, these covers are not capable of keeping out water that is splashed onto it when the rear wheels pass through water. Thus, the more water the wheels throw up, the more water enters the protective shield, with the inevitable result that corrosion starts to form on electrical connectors, as well as inside the vent valve’s control solenoid.

Where is the P0455 sensor located?

The image above shows the location (arrowed) of the charcoal canister and vent valve on a Ford Focus application. Note the location between the rear wheels, as well as the fact that the plastic cover is not waterproof. If it were waterproof, many instances of code P0455 on Ford applications could have been prevented.

What are the common causes of code P0455?

Apart from the most common causes of code P0455 on Ford applications described above, some other potential causes could include the following-

  • Defective, or poorly fitting fuel filler cap- especially aftermarket replacement caps
  • Damaged, burnt, shorted, disconnected, or corroded wiring and/or connectors, with corrosion being the most likely
  • Defective vent valve, with corrosion being the most likely cause of the malfunction
  • Damaged, clogged, kinked, dislodged, or perforated vapor lines as the result of shoddy workmanship during sometimes unrelated repairs
  • Defective fuel tank pressure sensor
  • Defective purge valve
  • Defective charcoal canister
  • Failed or failing PCM. Note that this is a rare event and the fault must therefore be sought elsewhere before any control module is replaced

BAT Team Discussions for P0455

  • 2004 Pontiac grand prix 3.8L
    You mean P0455...large evap leak......could be a broken/leaking line.....bad vent solenoid....bad fuel tank pressure sensor....gas cap...fill pipe......any recent work on the gas tank(like changing a level sender).... Unfortunately, this is an easy one for a tech...we seal the system and add pressu...
  • '98 Grand Cherokee, 5.2, po455, comes and goes
    A large leak has been detected in the evaporative system. See TSB 25-001-02. Also, possible faulty or loose gas cap. Note: The respective Powertrain Diagnostic Procedures Manual will direct the technician to determine if the vehicle evaporative system has an external system leak. Examples of some ex...
  • 2000 stratus 2.5 v6 check engine light came on.....
    I have a 2000 stratus 2.5 v6 and the check engine light came on what does this code really mean? 161-p0455 it said its the evaporater system leak. could that mean theres a vacuum leak? i already checked all the hoses for that and there aint no leak could it be the sensors? like th AGR valve?...
  • Chrysler 300M with P0455 Code Revisited
    Hello Again, I just wanted to update everyone on my problem with the 2001 Chrysler 300M. It is showing DTC P0455 Evaporative System Leak-Major. Here is what I have done to date: • Purchased a new gas cap and reset the DTC. A few days later it came back. • Followed TSB 2500102A that Kev2 kin...
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    Went to the dealership today and droped my car off. Write up states Check engine light is on and advise p0171 customer was advised at auto zone Needed Updated ECU Per TSB EG041-07 T.4 EG7033 T-2 99 Pulled codes P0171, P0441, P0455 Replaced The ECU and Input VIN Price = Warranty Work Looks Like ...
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P0455 Ford F150

One of the most common trouble codes with the Ford F150 is the P0455 code. This trouble code references a number that is given to you when you plug your F150 into a OBD2 scanner, and has to do with the emissions system. P0455 Indicates that there is a large leak in the evaporative emission control system (EVAP). It often appears with, or is related other codes, such as P0420, P0430, P0441, and very often P0440.

P0455: EVAP System → Leak Detected (Large)

P0455 is normally not an immediate threat to the drive-ability of your F150. Certainly anytime the service engine soon light is on, it’s good to deal with it as soon as possible though.

 

Ford F150 P0455 Definition

P0455 is a universal OBDII trouble code. This means that regardless of which make or model of vehicle, the code will mean the same thing (F150 or not). The code technically stands for:

System Gross Leak Evaporative Emission System

The EVAP system captures all fuel vapor from the fuel tank and sends them to the engines intake in order to be ignited in the normal combustion process. When there is a large leak in the Ford F150’s EVAP system, it will throw the P0455 OBDII Code.

 

Ford F150 P0455 OBDII Code Symptoms

P0455 OBDII Code Diagnosis Ford F150

P0455 code will typically not be accompanied by any noticeable symptoms other than the smell of gas and the service engine soon light. You may notice the slightest dip in fuel economy as well.

You should particularly notice the smell of fuel around the fuel tank area or fuel filler tube.

The EVAP system deals directly with fuel vapors. If these vapors are leaking from the system, you’ll often smell them faintly while operating the vehicle.

 

F150 P0455 Trouble Code Causes

There are many things that can cause the P0455 trouble code to trigger in your Ford F150. Here are the most common problems that will throw the code:

 

  • Evap System Hose– The hose that carries the fuel vapor from the fuel tank to the intake manifold can begin to leak. This will cause the P0455 code. Look for either a tear or hole in it. This is one of the most common issues that causes the code
  • Vapor Canister Purge Valve– One of the most common causes of the P0455 code is the vapor canister purge valve. It’s really easy to replace. There are a few clips that you need to find and remove.
  • Faulty Charcoal Canister– The charcoal canister is often the cause of P0455.
  • Fuel Tank Sending Unit– It is possible for the gasket that attaches the fuel sending unit to the gas tank to go bad. This can reduce tank pressure and throw the code.
  • Fuel Cap– A bad fuel cap can cause the code to be thrown for sure. Often, you’ll get a message informing you that the fuel cap is off even when it is on. If you are getting that message, plus a P0455, it may save you a ton of time and money to replace the fuel cap and see if it goes away.
  • Fuel Filler Neck– There is often a gasket where the fuel filler neck connects with the gas tank. This gasket can dry out, especially with vehicles that spend their time in dry climates. When it dries out, the fuel tank can’t hold pressure anymore.

 

P0455 Diagnosis- Ford F150

A mechanic has a wide range of instruments at his disposal to diagnose what would be causing the P0455 in your Ford F150. Here are the most common things that are done to diagnose the code:

  • The mechanic will typically check to see if there are any other trouble codes. The more trouble codes there are, the easier it can be to diagnose a problem. That’s because when they appear together in certain combinations, there will often only be only a few conditions that will throw any combination of codes at one time.
  • After ascertaining what trouble codes appear with the P0455, the mechanic will typically inspect the EVAP system. This includes the purge valve, line, and canister.
  • The mechanic will inspect the gas cap to make sure that it can handle pressure. If you are getting a warning that your gas cap is off, even when it’s on, replacing it will more than likely clear this code.
  • The fuel tank pressure will be checked and monitored.
  • After for the checks and fixes listed above, the mechanic will perform two tests:
  • A smoke test, and they’ll use a scan tool to confirm that the EVAP solenoids and valves are operating properly.

Here’s a pretty good video on diagnosing these leaks from Scotty Kilmer, if you are interested:

While the trouble code may state that there is a “large leak” in the EVAP system of your Ford F150, the actual leak will most likely still look rather small. The “large” really is referring to how much pressure is being lost.

 

Most Common P0455 Fixes

P0455 Fix Ford F150

Here are the most common F150 P0455 fixes:

  • Gas cap replacement
  • EVAP line replacement
  • Replace charcoal canister
  • Replace the fuel tank

Of all the items listed above, it would be wise to start with the gas cap and work your way to the fuel tank, since the gas cap is far and away the easiest and least expensive items to replace on here.

Here’s a great video on how to test your gas cap.

Good luck figuring out what is causing your Ford F150 to throw the P0455 code. We hope this helps. If there is anything that you feel like you could add, please feel free to leave a comment below.

 

Is P0455 a Serious Concern?

While P0455 is not going to cause the F150’s engine to stop running, it should not be treated lightly. You could have a fuel leak. Pay extra attention to your tank level and make sure you are not leaking fuel. We recommend taking it in and/or dealing with it right away.

Categories Ford F150Sours: https://www.700r4transmissionhq.com/p0455-ford-f150/

P0455 Code: Evaporative Emission Control System Large Leak Detected

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Because you notice that your check engine light is on all of a sudden, you plug in your scan tool into the OBD-II port to check what the issue is. Turns out, the P0455 code has been stored. While you may be looking at a potential gas cap issue, you’re not dismissing the fact that there may be another problem causing this trouble code to set. What does this code mean and what problems could be causing it? Could you still drive with a code P0455 present? Answer all these questions and more with this quick guide.

What Does the P0455 Code Mean?

Diagnostic trouble code (DTC) P0455 stands for “Evaporative Emission Control System (EVAP) Large Leak Detected”. Your car’s computer will set the code when it determines there’s a significant leak in the EVAP system.

Users have reported code P0455 for the following makes: Chevrolet (especially on a Chevy Silverado), Dodge, Ford, Jeep, and Nissan.

Note: The definition of trouble code P0455 may be different depending on the vehicle manufacturer. Consult the appropriate repair manual or repair database for the exact code definition.

What Is an EVAP System and How Does It Work?

Okay, that’s great. But you’re probably wondering: what’s an EVAP system? Basically, it’s a collection of components that work together to prevent fuel vapors from escaping into the atmosphere.

vehicle gas cap left open

Basic (non-enhanced) EVAP systems were first introduced in the 1970s. In 1996, automakers began fitting new vehicles with enhanced systems that can detect a leak, then set a code, such as P0455.

The system creates a sealed environment designed to capture, store, and purge volatile fuel vapors from the fuel system.

Although system designs vary, typically, the primary components found within an EVAP system include the fuel tank, gas cap, purge valve, vent valve, and EVAP (charcoal) canister.

When the engine is off, fuel vapors are stored in the charcoal canister, rather than being allowed to escape into the atmosphere.

Once the engine is running and the appropriate conditions are met, the purge valve opens to allow the vapors to enter the engine, where they are burned during the normal combustion process. The vent valve, which allows fresh air to enter the charcoal canister, is usually open unless the system is running one of its self-tests.

Your engine control module (ECM) controls both the purge and vent valves via electronic solenoids. The ECM also monitors EVAP system operation, checking for leaks and other issues.

EVAP System Tests and the P0455 Code

To ensure that the EVAP system is working properly, the ECM performs fuel vapor leak tests. These tests may occur when your vehicle is parked (the engine is switched off) or while it’s running.

During these vapor leak tests, the ECM sends a signal to close the vent and purge control valves. After that, the ECM monitors the entire system for pressure changes or vacuum loss. The ECM then stores codes depending on the potential size of the leak. Large leaks are recorded as code P0455, while small leaks are recorded as P0456.

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What are the Possible Causes of the P0455 Code?

Wondering what’s causing the issue? Here are some of the possible reasons why you’re getting this OBD-II code:

  • Gas cap is missing, left open, or not secured properly
  • Gas cap is faulty or damaged
  • Fuel tank filler neck is deformed
  • Fuel tank is cracked or damaged
  • Fuel tank pressure sensor is faulty
  • Charcoal EVAP canister is cracked or damaged
  • EVAP hoses and clamps are disconnected, cracked, or punctured
  • EVAP vent solenoid is faulty or stuck open
  • EVAP purge valve is faulty and stuck open

What are the Common Symptoms of the P0455 Code?

check engine light of a car illuminating

While many trouble codes have several noticeable symptoms, for some, an activated check engine light may be the only indication. As for the P0455 trouble code, you may notice the following symptoms:

How to Diagnose the P0455 Code

When trying to diagnose a P0455 code, the first thing a layperson should do is make sure the gas cap is on tight. A loose or faulty gas cap can easily trigger the code. If tightening the gas cap doesn’t work, you may want to try purchasing and installing a new gas cap, since doing so is cheap and easy.

Keep in mind: once you’ve tightened or replaced the gas cap, you’ll have to clear the code with a code reader or scan tool afterward. The code won’t immediately go away on its own.

If the gas cap doesn’t solve the problem, you’ll need to dig further. There are numerous potential causes for OBD-II code P0455. As such, diagnosis can be difficult. For an idea of how to troubleshoot the code, check out the videos below:

How to Fix the P0455 Code

As mentioned, there are multiple possible reasons why code P0455 gets activated in your car, which means the only way to fix the issue is to look for the parts that are contributing to the problem and either repair or replace them. If your gas cap was left open, secure it, and see if that fixes the issue. However, this may not be effective in other cases. For some, gas cap replacement is the only solution. If replacing the gas cap doesn’t fix it, replacing damaged EVAP system tubes and hoses may be the answer.

Keep in mind that all vehicles are different, so it’s extremely important that you only follow factory repair information for your application. It’s best to have a mechanic work on advanced repairs, but if you want to fix the code yourself, you may consider getting a repair manual, such as Chilton or ALLDATA to get detailed repair information.

mechanic looking at hood

Other Notes About Code P0455

Aside from the symptoms listed above (i.e., activated check engine light and slight fuel smell), there may be no other noticeable symptoms for the P0455 trouble code. As such, this code may not be considered severe. Note that fuel economy issues may arise as a result of fuel vapor leaks. And so, like other diagnostic trouble codes, P0455 should be addressed immediately to avoid potential fuel mileage problems and other complications concerning the emission control system and other vehicle components.

Also, an evaporative emission control system leak doesn’t only pollute the air while the vehicle is running. Harmful evaporative emissions can be released into the atmosphere 24/7 from a hole as small as a pinprick. This is why it’s important to consult a licensed mechanic when faced with a P0455 engine code as soon as you have ruled out a gas cap issue.

There are other diagnostic trouble codes related to code P0455. These include P0450, P0451, P0452, P0453, P0454, P0456, P0457, P0458, and P0459.

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File Under : OBD-II Trouble CodesTagged With : fuel-tank , gas-cap , vapor-canister , vapor-canister-vent-solenoid

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Ford p0455

P0455 FORD Code - Evaporative Emission Control System Leak Detected Gross Leak

AutoCodes - Ford - P0455 FORD

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What does this mean?

|P0455 FORD code possible causes

  • Missing or loose fuel cap
  • Incorrect fuel filler cap used
  • Fuel filler cap remains open or fails to close
  • Foreign matter caught in fuel filler cap
  • EVAP canister or fuel tank leaks
  • EVAP system hose leaking
  • Fuel tank leaking

|How do I fix the P0455 FORD code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What does this mean?

|P0455 FORD code tech notes

The P0455 is a common code since it will set if the gas cap is loose or missing. Start by tightening the gas cap and clearing the code. In most cases, the code can be clear by disconnecting the car battery for about 30 minutes.

There is a factory service bulletin for the following Ford vehicles:
1997-2000 Ford Contour
1997-2002 Ford Escort
1997-2003 Ford Crown Victoria
1997-2003 Ford Mustang
1997-2003 Ford Taurus
1998-2003 Ford Escort ZX2
2000-2003 Ford Focus
2002-2003 Ford Thunderbird
1997 Ford F-250 HD
1997-1999 Ford F-250 LD
1997-2003 Ford E Series
1997-2003 Ford Expedition
1997-2003 Ford Explorer
1997-2003 Ford F-150
1997-2003 Ford Ranger
1997-2003 Ford Windstar
1999-2003 Ford F Super Duty
2000-2003 Ford Excursion
2001-2003 Ford Escape
2001-2003 Ford Explorer Sport Trac
2001-2003 Ford Explorer Sport
Ford Factory Service Bulletin OBDII Code P0455





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|Cost of diagnosing the P0455 FORD code

Labor: 1.0

The cost of diagnosing the P0455 FORD code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are P0455 FORD code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Possible a noticeable fuel odor caused by the release of fuel vapors

|P0455 FORD code description

Vehicles that meet enhanced evaporative requirements utilize a vacuum-based evaporative system integrity check. The EVAPsystem integrity check uses a Fuel Tank Pressure Transducer (FTPT), a Canister Vent Solenoid (CVS) and Fuel Level Input (FLI) along with the Vapor Management Valve (VMV) or Electric Vapor Management Valve (EVMV) to find 0.040" diameter or larger EVAPsystem leaks. Federal vehicles can utilize a 0.040" leak check rather than the 0.020" leak check required for California vehicles.
The Diagnostic Trouble Code (DTC) will set when the EVAPcontrol system has a very large leak such as the fuel filler cap fell off, the EVAPcontrol system does not operate properly.
OBDII Code P0455 Ford - Evaporative Emission Control System Leak Detected Gross Leak - AutoCodes.com

|Need more information with the P0455 FORD code?

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|P0455 FORD code information for specific Ford models

|P0455 FORD code comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above helps you fix the code. What are the symptoms on your vehicle for the P0455 Ford code? Have you replaced any parts?
Any information is appreciated. Thanks

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P0455 FORD Code - Evaporative Emission Control System Leak Detected Gross Leak

Engine-Codes - Ford - P0455 FORD

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Repair Difficulty Level: 3/3  What is this?

What does this mean?

|P0455 FORD code possible causes

  • Missing or loose fuel cap
  • Incorrect fuel filler cap used
  • Fuel filler cap remains open or fails to close
  • Foreign matter caught in fuel filler cap
  • EVAP canister or fuel tank leaks
  • EVAP system hose leaking
  • Fuel tank leaking

|How is the P0455 FORD code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What does this mean?

|P0455 FORD code tech notes

The P0455 is a common code since it will set if the gas cap is loose or missing. Start by tightening the gas cap and clearing the code. In most cases, the code can be clear by disconnecting the car battery for about 30 minutes.

There is a factory service bulletin for the following Ford vehicles:
1997-2000 Ford Contour
1997-2002 Ford Escort
1997-2003 Ford Crown Victoria
1997-2003 Ford Mustang
1997-2003 Ford Taurus
1998-2003 Ford Escort ZX2
2000-2003 Ford Focus
2002-2003 Ford Thunderbird
1997 Ford F-250 HD
1997-1999 Ford F-250 LD
1997-2003 Ford E Series
1997-2003 Ford Expedition
1997-2003 Ford Explorer
1997-2003 Ford F-150
1997-2003 Ford Ranger
1997-2003 Ford Windstar
1999-2003 Ford F Super Duty
2000-2003 Ford Excursion
2001-2003 Ford Escape
2001-2003 Ford Explorer Sport Trac
2001-2003 Ford Explorer Sport
Ford Factory Service Bulletin OBDII Code P0455



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|What is the cost to diagnose the P0455 FORD code

Labor: 1.0

The cost to diagnose the P0455 FORD code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are P0455 FORD code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Possible a noticeable fuel odor caused by the release of fuel vapors

|What is P0455 FORD code meaning?

Vehicles that meet enhanced evaporative requirements utilize a vacuum-based evaporative system integrity check. The EVAPsystem integrity check uses a Fuel Tank Pressure Transducer (FTPT), a Canister Vent Solenoid (CVS) and Fuel Level Input (FLI) along with the Vapor Management Valve (VMV) or Electric Vapor Management Valve (EVMV) to find 0.040" diameter or larger EVAPsystem leaks. Federal vehicles can utilize a 0.040" leak check rather than the 0.020" leak check required for California vehicles.
The Diagnostic Trouble Code (DTC) will set when the EVAPcontrol system has a very large leak such as the fuel filler cap fell off, the EVAPcontrol system does not operate properly.

OBDII Code P0455 FORD - Evaporative Emission Control System Leak Detected Gross Leak - Engine-Codes.com

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|P0455 FORD code information for specific Ford models

Repair Importance Level:1

 

1=Low 2=Medium 3=High What is this?

Repair Difficulty Level:3

 

1=Easy 2=Moderate 3=Hard What is this?

Browse Codes for Specific Model-Year

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