why does the light still come on even if all the codes have been erased and theres non in the history of the DTCs i notived it cause i scanned it the other day and no codes were present only the once on the history and i deleted them and the light still comes on any suggestions as to why it still comes on when im driving.

 

scan it again and see what codes are there.Generaly if the lights on there is a code there.What kind of car and engine?

 

Depends on the code - some set immediately, some after a couple consecutive cycles with a failure.

 

its a 95 3.4L camaro auto

 

I'm not sure that all codes stay resident on a 3.4 when you shut the car off. Can you scan it after the SES has come on without shutting the car off?

 

well ill try that
thanks

 

the codes stay in the memory untill cleared manually.shutting the car off won't effect the scan.

 

pull the ecm fuse and leave it out for like 30 sec. then put it back in it should clear everything from the computer. and if there are and problems the ses light will come back on.

 

but nothing will mess up if i take that fuse

 

You would think so but I have had numerous SES lights triggered by the EGR and had it scanned which came back with nothing. It was only after driving the car with the scanner connected and viewing the live stream that we were able to see the result.

I have seen posts by a few other 3.4 owners who say the same.

 

o thanks man