Trouble codes evap
#1
Trouble codes evap
So I just got a 2004 LR Disco 2 88,000 miles and trying to get the inspection done but ran into some problems....
on my way to the inspection station, I kid you not, the check engine light came on. I went straight to my local auto parts store and checked the code it was the gas cap code. (P0455) evaporative emission system leak detected gross leak no flow. Well I had them clear the code and tightened the gas cap. Well not knowing the vehicle needed to be ran through a drive cycle I went straight to the inspection center and of course failed the inspection. I ordered an OBD I’ve now driven about 100 miles and still show “cat” not ready “evap” not ready and a new code!! P0135.
Any ideas on what could be going on.... new to the Disco community so hope this isn’t a rookie problem but if it is I’ll consider it a part of my initiation.
on my way to the inspection station, I kid you not, the check engine light came on. I went straight to my local auto parts store and checked the code it was the gas cap code. (P0455) evaporative emission system leak detected gross leak no flow. Well I had them clear the code and tightened the gas cap. Well not knowing the vehicle needed to be ran through a drive cycle I went straight to the inspection center and of course failed the inspection. I ordered an OBD I’ve now driven about 100 miles and still show “cat” not ready “evap” not ready and a new code!! P0135.
Any ideas on what could be going on.... new to the Disco community so hope this isn’t a rookie problem but if it is I’ll consider it a part of my initiation.
#2
It takes a long time for the system to become ready again for test after resetting codes. Also, the plastic threads on these gas caps have a tendency to swell over time, so you may think the cap is on tight but the rubber gasket may not be sealed against the metal on the filler neck. Spray a little WD-40 on the plastic threads on the cap and make sure it's screwed down tightly. Alternatively, get a new cap - the OEM Rover gas caps are only like $10.
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Carlos Man (08-01-2019)
#3
#4
#5
could also be the purge valve. there is an inexpensive Hyundai purge valve that will work. can't remember the part number.
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Carlos Man (08-13-2019)
#6
The following users liked this post:
Carlos Man (08-13-2019)
#7
#8
#9
Cleaning the inside of the fuel filler neck neck pipe worked for me... As suggested by a forum member, use a scotch bright pad and make sure to scour all around the ring just inside the lip where the cap threads onto. I found scale buildup on the lower side of that ring which when removed helped seal my cap.
#10
Cleaning the inside of the fuel filler neck neck pipe worked for me... As suggested by a forum member, use a scotch bright pad and make sure to scour all around the ring just inside the lip where the cap threads onto. I found scale buildup on the lower side of that ring which when removed helped seal my cap.
will the code clear on its own or should I clear it and do another drive cycle after?