Question about 2002 Jeep Grand Cherokee

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P0455 check engine code - 2002 Jeep Grand Cherokee

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  • John Gue Jul 18, 2012

    Found my problem, was a split vacuum hose on top of the evap canister, not easy to get to because I had to take the bumper cover off. the canister is located in the left rear of jeep. Thanks for your help

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2 Answers

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  • Jeep Master
  • 5,763 Answers

Po455 is for aevap leak detected. the first common problem is a loosen or missing gas cap, there other most common is broken vaccum lines to the evap-system, heres a diagram to help you locate the lines to check,i circled where to start also try replacing gas cap if its not loose,also the purge valve is another part that goes bad if you start the truck cold you should hear and feel that valve running after a few minutes of engine running.hope this is helpful.P0455 check engine code - 8c8efc2.gif

Posted on Feb 07, 2010

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  • Jeep Master
  • 2,030 Answers

That code relates to your evaporative system

Start with checking that you gas cap is on all the way and seal...many times replaceing the gas cap will fix this problem.

Posted on Feb 07, 2010

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Posted on Jan 02, 2017

  • 202 Answers

SOURCE: 1999 lincoln navigator obd code p0455

Either the fuel cap, or the evap solenoid on the charcoal canister. I'd start with the fuel cap.

Posted on May 27, 2009

  • 1779 Answers

SOURCE: What is the trouble code p1684, and p0455.

1684 is 'battery disconnected in last 50 starts' and should shut off after you have used it for 50 more.
0455 is 'Evaporative emission control system leak detected (gross leak)

Posted on Mar 25, 2009

  • 184 Answers

SOURCE: gm dignostic code p0455

A little late but check your gas cap first.

http://www.p0455.com

Posted on May 03, 2009

XKarDoc
  • 443 Answers

SOURCE: 2006 Ford Fusion 2.3L I4

The check engine light won't go out unless you (1) clear the code with a tester or (2) give the computer a chance to determine the problem is no longer there. It has to go thru several test cycles detecting no problem before the computer will turn the light off. You could also have another problem causing an evaporative emission leak (like a vent hose for instance).

Posted on Jun 06, 2011

  • 2006 Answers

SOURCE: 2006 Ford Fusion 2.3L I4 Engine Check engine light

Common Problems That Trigger the P0455 Code

  • Defective or damaged fuel cap
  • Distorted or damaged Fuel Tank Filler Neck
  • Small tear or puncture in the Evaporative system hose(s) and/or Carbon Canister
  • Defective Fuel Tank Sending Unit gasket or seal
  • Small split in a seam of the Carbon Canister
  • Defective Evaporative Vent Valve and/or Evaporative Purge Valve
  • Defective or damaged Fuel Tank
  • Defective Fuel Tank Pressure Sensor
  • Defective Leak Detection Pump
  • Slightly loose and/or worn clamps or hardened O-rings anywhere in the EVAP system
Common Misdiagnoses
  • Fuel cap
  • Evaporative Purge Valve
  • Evaporative Vent Valve

This is a link to a Ford Motor Company PDF file that explains this fault in great detail and is worth reading and studying.
.
http://www.motorcraftservice.com/vdirs/diagnostics/pdf/OBDSM601.pdf

Posted on Jun 06, 2011

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