Check engine light & gas cap on '05 cdi
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Super Member
Joined: Jun 2005
Posts: 597
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From: Monterey, CA
'97 E320
Check engine light & gas cap on '05 cdi
Got a check engine light last week on our '05 cdi, and tightened up the gas cap. Light went off for the next few starts and then came back on. Went ahead and replaced fuel cap with a new OEM unit, and light went off for a few days. Now light turns on sporadically, every few starts or so. Car runs perfectly otherwise.
My question is: If a CEL is triggered by a faulty gas cap and the cap is replaced, does the code need to be manually reset or will it turn off on its own and stay off? On my '08 Dodge pickup, some codes are stored and have to be manually reset or it'll keep throwing a light even if the problem has been fixed.
I also have been noticing a bit of a diesel smell the last couple days, so it's going in to the shop this week to repair/replace what I'm guessing is a leaky fuel line connection. This happened once years ago where a fuel hose clamp needed to be replaced, but that never triggered a CEL.
My question is: If a CEL is triggered by a faulty gas cap and the cap is replaced, does the code need to be manually reset or will it turn off on its own and stay off? On my '08 Dodge pickup, some codes are stored and have to be manually reset or it'll keep throwing a light even if the problem has been fixed.
I also have been noticing a bit of a diesel smell the last couple days, so it's going in to the shop this week to repair/replace what I'm guessing is a leaky fuel line connection. This happened once years ago where a fuel hose clamp needed to be replaced, but that never triggered a CEL.
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Joined: Nov 2009
Posts: 149
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From: austin, texas, usa
2006 e320 cdi
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300E a couple 1994 w124wagon E320 Wagon/,1971MGB Track/Rally, MG Midget Autocross ,2000 E320 wagon.
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4001 S LAMAR BLVD
Austin, TX 78704
harborfreight pick up the 98568 obd2 scanner for 59 bucks
reads live data,views freeze frame data,reads codes etc. etc. etc.
tear out the 20% coupon from field and stream magazine and save more.
It most likely is not the fuel cap and you are guessing at the cause.(fuel cap loose the fuel light blinks) then it throws a code.
The post above was spot on,pull the code or codes,it might not even be a problem with the evap system it could be a problem in the other sections of the emissions system.
Austin, TX 78704
harborfreight pick up the 98568 obd2 scanner for 59 bucks
reads live data,views freeze frame data,reads codes etc. etc. etc.
tear out the 20% coupon from field and stream magazine and save more.
It most likely is not the fuel cap and you are guessing at the cause.(fuel cap loose the fuel light blinks) then it throws a code.
The post above was spot on,pull the code or codes,it might not even be a problem with the evap system it could be a problem in the other sections of the emissions system.
