Check Engine light stays on on 2001 Saturn SC2

Nothing wrong with the car. How can I reset this light at home?

by in Blackwood, NJ on January 18, 2009
2 answers 4 comments
ANSWER by on January 18, 2009
The check engine light stays on when it sees a fault in the emissions system. This usually also means that your engine is not running as efficiently as it could be. You'll want to have the computer scanned for trouble code(s). If you reset the light without repairing the fault, the light will turn back on. Many Autozone's scan the trouble code for free but you'll want to call first so you don't waste your time.
COMMENT by on January 19, 2009
I would still like to reset it. If the problem persists the light will come back on and I will take it for service then. In the meantime I will take it to Auto Zone. Thanks.
COMMENT by on January 19, 2009
This is the Service Engine Soon (SES) light and not a wrench light correct? Unplugging the PCM-B fuse in the engine compartment fuse block for 5 minutes will reset the PCM. The panel for the fuse block has a diagram. I would guess disconnecting the battery ground for 5 minutes will achieve the same result but you lose your radio presets (sometimes auto windows need to be recalibrated). If the light comes back it may take a couple "drive cycles" to set a fault. A drive cycle is typically a start from a cold soak (engine fully cold), drive until running at normal operating temperature, shut off and allowed to cool completely. This may take a couple of days as there may be other conditions. If you get diagnostic codes, post them here and I, or someone else, can try to help you further
COMMENT by on November 03, 2010
My check engine light stays on I checked the gas cap and that wasnt it,could it also be low on power steering fluid make the check engine light come on low on fluids????
COMMENT by on November 22, 2010
It could be the EGR valve. I had the same problem. Apparently, there are 3 flaps to the EGR valve. One of the flaps malfunctions (or is faulty) & will not open. He tested it & found that the 'faulty' flap opens when the speed reaches 80km, so he said there was nothing to 'worry about because it opens when it really required (i.e. at high speed).
ANSWER by on May 26, 2010
diconnect your battery see if thats works ive done nothing wrong with that try see if works worth a shot
Related Items:
engine has never over heated but the check engine light came on and stays on the trouble code is po128 and last night the red light came on that looks like water level on radiator but it is full.