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2002 wrangler 4.0 6 cylinder error codes P0455 and P0442: replaced gas cap, had several hoses with splits that i removed, taped and reinstalled around what i think is the evap canister where can i find diagram showing evap canister, leak detection pump, purge valve, etc

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  • Anonymous Mar 23, 2014

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2002 wrangler 4.0 6 cylinder - moz-screenshot.pngsalkim08.gif
Here is a picture of the canister and all the other parts.Let me know if this worked for you.One other thing is if you have a leak taping it will not keep it from leaking.You will have to replace the part that is leaking or not working properly.Let me know how this picture works out.This is the first time I have tried this.Good luck and thanks for using fixya.

Posted on Nov 13, 2010

  • Salvador Quintanilla Nov 13, 2010

    I forgot to tell you this is under the hood on the drivers side by the master cylinder.

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My malfunction indicator light is on dodge neon 2001: got codes P1684,P0455


this obd2 trouble code table can help you understand the meaning of code.
and for p0455, you can try:

Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.

Otherwise, replace the gas cap, and/or

Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary

Sep 01, 2011 | 2002 Dodge Neon

2 Answers

P0455 and p0442


p0455-- emission control system ( a large leak ) the most common cause is a bad seal on fuel cap, remove and replace cap, if light stats on. replace cap. if not the cap it could be any where in emission system. p0442 is--same as above. Code p0442 indicates a fuel vapor leak in the EVAP control system. To fix this problem, remove and reinstall the gas cap. Clear the codes and drive to see if the codes reappear. If the code appears again replace the gas cap or inspect the system for cuts or holes in the tube or hose. good-day !

Aug 24, 2011 | 2002 Jeep Grand Cherokee

1 Answer

Engine light comes on and when scanned it comes up with a an error code p0442. It does not affect the operation of the motor.


p0442 is evap emissions control system leak ( small ). to fix, The first thing you will want to do is tighten or replace your fuel cap. This is the most common cause of this code. If that does not fix it then you should open your hood and inspect all hoses for damage. remove and reinstall the gas cap. Clear the codes and drive to see if the codes reappear. If the code appears again replace the gas cap or inspect the system for cuts or holes in the tube or hose. good-day !!

Jul 23, 2011 | Chevrolet Malibu Cars & Trucks

2 Answers

P0449 and P0455 error code 2008 2wd gmc envoy 30,203 miles


P0449 - Evaporative Emission Control System Vent Valve/Solenoid Circuit Malfunction

P0455 - Evaporative Emission Control System Leak Detected (no purge flow or large leak)

Both are refer at EVAP system; other EVAP DTCs: P0440 - P0441 - P0442 - P0443 - P0446 - P0453 - P0455 - P0456

This indicates a fuel vapor leak or lack of purge flow in the EVAP control system. It means a large leak has been detected. The (EVAP) emission control system prevents the escape of fuel vapors from a vehicle's fuel system. Fuel vapors are routed by hoses to a charcoal canister for storage. Later, when the engine is running a purge control valve opens allowing intake vacuum to siphon the fuel vapors into the engine.

Symptoms: You likely won't notice any drivability problems.
Causes: most likely means one or more of the following has happened:
A loose or improperly affixed gas cap
A non-conforming gas cap (i.e. not factory/original brand)
Other leak or damaged piece in EVAP system

Possible Solutions: the most common repair is to:
Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
Otherwise, replace the gas cap, and/or
Inspect the EVAP system for cuts/holes in tubes/hoses (you may hear a vacuum noise or smell fuel), repair if necessary


Hope helps.

Apr 23, 2011 | 2008 GMC Envoy

1 Answer

I have a engine code of P0455 and P0442. i bought a new gas cap and the light was reset and now it is back on. What should I do next? and should i take my car to the dealership for diagnostics.


They always say gas cap, been my experience that it may be a cracked/collapsed hose. So take your time and inspect all your black hose that look about 1/4 to 3/8 in diameter in the engine compartment. Thats where I found my leak, crack rubber hose, the short rubber ones the connect to the rigid black tubes....
Hope this helps..

Jan 13, 2010 | 2002 Jeep Liberty

1 Answer

Error codes p0442 & P0455


Those are both Evaporative Emission Control System related.
442 is a small leak has been detected.
455 is a bigger leak has been detected.
Check all your connections, (electrical & vacuum lines) as well as check for any cracked, loose vacuum hoses in the system, as well as clean "O" ring on your gas cap well and threads in filler pipe & make sure gas cap is tight. Do the gas cap first & see if codes dissappear, but it may take a new gas cap. These codes commonly appear shortly after getting gas, due to cap not back on tight.

Oct 02, 2009 | 2001 Dodge Caravan

1 Answer

Code P0442 Engine Light


Causes A code P0442 most likely means one or more of the following has happened:
  • A loose or improperly affixed gas cap
  • A non-conforming gas cap (i.e. not factory/original brand)
  • A small leak/hole in a fuel vapor hose/tube
  • Other small leak in EVAP system
  • Faulty vent o-ring seal
Possible Solutions With a P0442, the most common repair is to:
  • Remove and reinstall the gas cap, clear the codes, and drive for a day and see if the codes come back.
  • Otherwise, replace the gas cap, or
  • Inspect the EVAP system for cuts/holes in tubes/hoses

Aug 04, 2009 | 2001 Dodge Neon

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