OK, I searched and could not find.

Weird problem, as stated in title, when key is turned to on position the CEL light does not come on. Also, while driving I m getting a CEL light on occasion. I was able to pull the codes once and got EGR and O2 sensors as the problem, this I can have repaired. What worries me is the CEL light not behaving correctly. Is my ECU going bad? The car has been running rough lately.

92 sc400, stock.

Thanks in advance for any help!!

 

Bump

Anyone heard of anything like this?

 

Are you sure someone has not pulled the light out the dash an another light is illuminating your CEL? I've seen this happen in an LS before.

 

nope, its definitely the cel light. When driving it definitly comes on on occasion and with repeated tries I can get the cel codes. That is why I am concerned about it not coming on when the key is in the on position.

 

I had this problem, but when the CEL wasnt on in the "ON" position, the car would not start.

It was a bad ECU. I got a replacement from Aliga.

 

Thanks, gonna go with a ebay ECU nd see if that fixes the issue.

Hehe, I have seen your car around. You must work at the CompUSA in clearwater. I always see it there!

 

are you sure its really something worth worrying about... you might have a bad bulb or intermittent connection...

honestly, who cares... so long as you know how to pull codes and check them, why worry about it...