Gas cap/ check engine light
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e350
Gas cap/ check engine light
For past month everytime I get gas, about 12 hours later the check engine light will come on, I hooked up scan tool and it says loose gas cap, it's been happening for past month or 2, then it will go off few days later, anyone else experience that? Also should I buy new gas cap?
Out Of Control!!
Joined: Apr 2019
Posts: 11,921
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From: Silicon Valley
W212 MY'14 M276-3.5NA @75kMi
NOT COMMON EVAP FAULT
For past month everytime I get gas, about 12 hours later the check engine light will come on, I hooked up scan tool and it says loose gas cap, it's been happening for past month or 2, then it will go off few days later, anyone else experience that? Also should I buy new gas cap?
Read the scanner data stream about your EVAP purge. There are automatic scanner tests to run against this system.
Before you spend time to figure this all out... you can do a visual inspection of the gas cap and the line...
Any way someone may have tempered with your gas filler pipes??
Last edited by CaliBenzDriver; Nov 10, 2024 at 09:32 PM.
