I pulled the dtc on my 02 tj and it displayed 122 tps voltage low, 442 leak detected in evaporative system and 455 large leak in the evaporative system. Does this mean the fuel evaporative system? The light only comes on every so often and doesn't really cause any problems. Is this something to worry about or not.Thanks :???:
Evaporative system dtc help
- Thread starter mrkltj
- Start date
88Wrangles
New member
Yes. I would check all your lines and find out where the leak is coming from. Check your gas cap too and make sure it is sealing properly.
88Wrangles
New member
Ya definitly check the gas cap though that's a pretty commom one. Also if you leave your key "on" while you are filling up and the gas caps off it will sometimes set off a code too.
SteelHeadz
Super Moderator
The p0122 DTC can really affect the performance of your engine. i would pay more attention to the TPS code.. the other 2, P0442 and P0455 is an Emission Related DTC.. the P0455 could range from a loose gas cap to a purge solenoid valve failure or a leak detection pump failure, even then , this will not leave you stranded.. Check All your vac. lines on the intake manifold particularly the one on the side of the intake with a tee and a green valve cap. follow this line and check it for cracks or splits on the end where it attaches to the nipple.
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