The check engine light came on after i filled up the tank today. I dont think it was because of the gas, because i get gas there often and this is the first time it ever came on.

How do i check if a code came up or something? I'm new at this crap.

 

check your gas cap.

 

thanks for the quick reply.


i just checked it, it was on good and tight.

hmmm....

 

The best way to figure out why the SES light came on is to scan the computer for trouble codes. If you have a pre-1995**, you don't need an expensive scan-tool or code reader to check the codes, just a simple paper clip. Locate the ALDL (Assembly Line Diagnostic Lead). It is usually under the driver's side of the dash. If my memory serves me correct, there should be 12 leads on the ALDL...top row 6 leads...bottom row 6 leads. Find and short terminals A & B with a paper clip...(top row, last 2 leads on the right side of the ALDL which would be leads numbers 5 and six.)

1 2 3 4 5 6
7 8 9 10 11 12

Turn key on, but do not start engine. The check engine light will begin to flash. The ECM (computer) will display a "code 12" by flashing the "service engine soon" light, indicating that the system is operating. A code 12 is simply one flash, followed by a brief pause, then two flashes in quick succession. This code will be flashed 3 times. If no other codes are stored, code 12 will flash until the diagnostic terminal ground is removed. After flashing code 12 3 times, the ECM will display any stored trouble codes. Each code will be flashed 3 times, then code 12 will be flashed again, indicating that the display of any stored trouble codes has been completed. After you pull all of the codes, either post your results here and someone can help you descipher them or purchase a code book from an auto parts store.

 

Make sure to always have the gas cap click a few times after filling up. Alot of times this will cause the light to come on.