CE Light? - PeachParts Mercedes-Benz Forum

Gamecock · #1 02-08-2003, 06:48 PM

Will disconnecting the battery positive cable cause the computer to reset? My CE light came on because the air filter was on incorrectly (I think). Now it is on correctly and the car is running fine but the CE light is still on. Thanks for any advice.

Gilly · #2 02-08-2003, 11:18 PM

Typically they won't reset by pulling a battery cable, no. May depend on the year and the reason the fault was set to begin with. Some codes, if the reason for the fault is fixed, will just allow the light to go off after enough time or starts has past.
What year/model is it, and do you know the reason for the light to be on?

Gilly

Gamecock · #3 02-08-2003, 11:22 PM

It is a 98 C230. I feel like it is the air filter deal I mentioned in the original post. Call runs great w/ same gas mileage. MB dealer wants $87 just to run the codes.

Gilly · #4 02-08-2003, 11:39 PM

Hi:
I read through your earlier posts and saw the one where the air filter was removed. I agree AutoZone should be able to read/erase fault codes on your car. It is OBD2 compliant, and as such, by Federal Law, the codes are standardized for emission related codes, which is typically what causes check engine lights. They will need to access the 16 pin OBD2 connector, which I believe is under the drivers side of the dash panel (in the drivers footwell area under the dash).
It is possible that it may run reasonable well even though the Mass Airflow Sensor is bad. If it gets REALLY bad it'll run very poorly. It may be worth attempting to reset the light. A code with the description "Part-throttle self adaptation at limit" is usually caused by a bad Mass Airflow Sensor, but it should be tested.
Most any repair shop will have a scanner that will read OBD2 fault codes and should be able to read/erase the codes. I of course would suggest going the dealer route, consider it a character flaw I guess

.

Gilly

Gamecock · #5 02-09-2003, 07:02 AM

When the Autozone hooked up the link, they kept on getting a "error" message.

Gilly · #6 02-09-2003, 10:20 AM

I would say that either there is some particular fault in your car that won't allow communications with their scanner, or (more likely) a problem with their scanner. Maybe they were attempting to go in under OBD1, not OBD2? Not really sure, as i deal with the mercedes scanner, never a generic scanner, but their generic scanner has to be able to read the OBD2 codes. Is there another AutoZone you can try? Try another repair shop, doesn't have to be the dealer.
Maybe you got a guy at that AutoZone who wasn't familiar with reading codes. Also I think these scanners have different cartridges that are installed (different software) and maybe the wrong one was inserted.

Gilly

Gamecock · #7 02-09-2003, 11:08 AM

Thanks very much!