OthercarisaFiat

OK, I cleared the ECU last weekend, and today the CEL came on again for a few seconds and went out. Car was cruising at about 25mph, warm engine, 4th gear, outside temp about 32. Only code that came up today is 42 = idle switch. Car appears to run fine. What does an idle switch do? Is it important? Should I replace it?

I'll try that. If these codes are stored indefinitely, the cam angle sensor could be from when the timing belt broke 2 years ago. The others, I have no idea.

I had this happen on a different car, a 1992 Dodge Stealth. The SRS (air bag) light would come on whenever the battery voltage was too low, and would not self-clear. A dealer could clear the code, but then the light would come on again after the battery was low again.

I don't mean to hijack the thread, but my wife's car (93 Legacy turbo) is doing something similar. Only it's not quite as cold here, and it just started today. I drove it tonight and it didn't come on. I read the codes, they are: 13 - cam angle sensor 21 - Water temperature sensor 23 - Air flow sensor 42 - Idle switch If the cam angle sensor was faulty, the car shouldn't run (but it does). The others should affect running to some extent, but it seems to run fine. I'm assuming it's OK to drive for the time being. I don't know how old all those codes are either, so I'm thinking I will reset the ECU and see if it does it again.