This is a stupid problem, but maybe someone knows the answer. My '06 V70 wagon flashes a problem on the LCD readout about twice a month that "gas cap is off/loose". Obviously, I looked, and the cap was fully on (clicked). One time (and only one time) the fault lit the check engine light. I've taken it to two dealers, and both pressure tested the tank, and tested the cap. They both told me that basically I was an idiot, and didn't know how to close the cap. Maybe I don't know how to close a Volvo cap, but it seems to that after you fuel the car, you rotate the cap in a clockwise position, until it starts to click, and just give it another 180 degree. The warning from the display never appeared after fueling - typically about a half tank used.
2007-09-03 13:15:20 · 9 answers · asked by hbloff 1 in Cars & Transportation ➔ Car Makes ➔ Volvo
If the gas cap is on properly and the sealing ring is not damaged, then you should have the dealer check the system for leaks. If there are no leaks, then there are a number of components in the system, one of which has an apparent intremittent fault. If the dealer is in any way competent, they should be able to rule these out one by one until the culprit is found. Experience should tell him which is the most likely one to fail A faulty component like this associated with the fuel system could in theory cause a fire in your car. Should this occur, does your dealer wish to be responsible for it, just because he wasn't capable of debugging a simple fault in your fuel system?
2007-09-07 07:31:11 · answer #1 · answered by bdiskman 4 · 0⤊ 0⤋
That message/code sets when the Fuel Evaporative Emissions (EVAP) System performs a pressure test on the fuel tank and evaporative emission system. There are valves that must be closed by the computer when it performs this pressure test. The fuel filler cap must also be installed tight during this test as always should be the case. The most common reason for this test to fail is because of the gas cap being left loose and is why they felt the need to put a special light on the dash to indicate this. BUT, it's not the only reason the test can fail. One of the afore mentioned valves can malfunction and cause the pressure to leak off and the light to come on. Of course it must be an intermittent malfunction which would explain why they dont find a problem when they hook up the EVAP tester and perform a pressure test. What they should do is to replace all those valves and the problem should go away.
Please note that this is a generic explanation of the operation of the EVAP system on domestic vehicles>
2007-09-03 13:39:08 · answer #2 · answered by Ron B 6 · 1⤊ 0⤋
hmm, well it does sound like it could be a computer issue, but being that it is a '94 I doubt that it would be the computer because computers were a lot simpler in the early '90s. I would suggest have a shop check your throttle control body and the vacuums for the intake (sorry I can't think of specifics for that). I've had problems with those two things making my car rev really high but my speed change very little. One thing that I could say definitively, if you disconnect your battery and then connect it again and the check engine light remains lit, the shops didn't fix your car very well. If you gave more information on the engine and trans that would help.
2016-04-03 01:55:59 · answer #3 · answered by Anonymous · 0⤊ 0⤋
If the cap is not put on properly it will trigger the engine light but will turn off after the car is started a few times when the computer resets itself. make sure that the cap is threaded on right not just tight.
2007-09-04 13:40:33 · answer #4 · answered by ? 7 · 0⤊ 0⤋
have the evaporative system checked with a low pressure smoke/nitrogen gas tester. i have found many cracked ,split ,loose clamp ,rotted hose problems this way[just look for the smoke] if none is escaping and the flow meter reads zero replace the purge and vent valves [note typically the valves function normally during the test but must be suspect if no leaks are found.
2007-09-05 14:17:20 · answer #5 · answered by hobbabob 6 · 0⤊ 0⤋
I push on the cap while twisting it and click about 8 times.
2007-09-03 13:23:07 · answer #6 · answered by (A) 7 · 0⤊ 0⤋
I had an EVAP problem in my V40. I also had a problem with my ECM. You may want them to take a look at your electronic control module. Those have been known to be faulty on Volvos.
2007-09-05 16:53:52 · answer #7 · answered by Anonymous · 0⤊ 0⤋
ya may need a new cap check first that there isn't some sort of debrie on the gasket
2007-09-03 13:21:33 · answer #8 · answered by bungee 6 · 0⤊ 0⤋
Give it as many clicks as you want it is assuring that it is sealed.
2007-09-03 13:34:37 · answer #9 · answered by cgriffin1972 6 · 0⤊ 0⤋