SL55/63/65/R230 AMG: check gas cap light comes on after service at MB dealer
#1
check gas cap light comes on after service at MB dealer
Hi All,
I recently picked up my 2004 SL55 AMG from a MB Dealer (after they did a service B maintenance - fluid, check belts, etc.), and as I drove off, a check gas cap light came on.
There was no problem before I dropped off the car, and I suspect they may have disconnected a sensor or something during service.
After I stopped the engine, and restarted it, the warning went away. Then I drove it a little bit and then the warning came back. So, I turned off the engine, and started it again. Then I noticed the check engine light was on.
I'm guessing they may have disconnected a sensor --> which may have caused and OBDII event --> which results in the computer tripping the check engine light.
Does anyone know what they may have done?
Any help is appreciated.
Thanks in advance.
I recently picked up my 2004 SL55 AMG from a MB Dealer (after they did a service B maintenance - fluid, check belts, etc.), and as I drove off, a check gas cap light came on.
There was no problem before I dropped off the car, and I suspect they may have disconnected a sensor or something during service.
After I stopped the engine, and restarted it, the warning went away. Then I drove it a little bit and then the warning came back. So, I turned off the engine, and started it again. Then I noticed the check engine light was on.
I'm guessing they may have disconnected a sensor --> which may have caused and OBDII event --> which results in the computer tripping the check engine light.
Does anyone know what they may have done?
Any help is appreciated.
Thanks in advance.
#2
Member
You did actually check the gas cap besides the restarts, correct?
A faulty, loose or missing gas cap allows for an evap emission leak, which can also cause a check engine lamp
A faulty, loose or missing gas cap allows for an evap emission leak, which can also cause a check engine lamp
#3
fixed ...
Yup, I tried unscrewing and screwing the gas cap.
Anyways, they fixed it by end of the day. My gas cap looks the same (i.e.: not shiny new) so I suspect they did not change the cap or the seal.
The dealer said something about running/testing the car run without any cap at all, which caused a failure, which caused a check engine light…. Sounds odd to me. (i.e.: why would you do that?)
Anyways, thanks for the reply.
Anyways, they fixed it by end of the day. My gas cap looks the same (i.e.: not shiny new) so I suspect they did not change the cap or the seal.
The dealer said something about running/testing the car run without any cap at all, which caused a failure, which caused a check engine light…. Sounds odd to me. (i.e.: why would you do that?)
Anyways, thanks for the reply.
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