I have a 2001 Jeep TJ and I have recently had the engine light come on in the dash,when I checked the codes there were 2,P0442 and P0455,can anyone tell me what these codes are and where and how to fix this problem.Thanks

 

found these on other forums. MIL Code P0455 Question - JeepForum.com and Support Groups for Jeepaholics - p0455 p0442 codes

 

Hiya Griff,
I googled "2001 Jeep fault codes" and came up with this...Chrysler PT Cruiser computer codes Its for a PT cruiser but I just don't have the time at the moment to read every return. Might give some help. Just do a google man and you will probably find exactly what you're looking for. This was just one of ,like, 80K returns.

 

From 98 TJ FSM:

P0442 Evap leak monitor small leak detected. A small leak has been detected by the leak detection monitor.
P0455 Evap leak monitor large leak detected. The leak detection monitor is unable to pressurize Evap system, indicating a large leak.

03TJMJ's links will probably help you out and here's another one: Error codes P0455 & P0442 - JeepForum.com

I'd start by replacing the gas cap, making sure the rubber lines to your evap canister are still good and not cracked and resetting the PCM.

Good luck.

 

Thanks for your help

 

i had the same codes come up when I first bought my 01 TJ. The hose ends at the charcoal cannister had hair line cracks. I wrapped them in electrical tape as a bandaid fix but its worked for a year and no codes. I've seen alot of cracked evap hoses on Dakotas and Durangos where they pop right off.