Service Engine Soon light

[lp-mp]

Have you had any luck yet? I have an '03 SE Maxima that I've owned for 2 years. the Service Engine Light has been on pretty much since I've bought it. However, it only comes on when the temperature is warmer than -4C and the fuel is less than half a tank, so I only have to look at it for a few months of the year .

I talked with several Nissan technicians who said that as long as it's not blinking there's no real problem.

[rather_b_boatin]

I have some experience with my wife's 2001 CEL light. 1st time it came on was a P0420 catylist efficiency below threshold bank 1. Luckily it was under 75K, $tealer$hip took care of it and told me it would have been about $1000 to fix if out of warranty. I had

[chak5050]

Do you remember what they replaced at the Dealership? If I were to guess, I bet they changed your Cat. Which I know is not my problem since I've already changed it. I havn't been driving the car this winter, but within the next month I hopefully will be. I'm thinking about taking it to the dealership and paying the 100bucks to diagnose it, and hope they don't say Cat, or one of the other things I've tried.

[rather_b_boatin]

Oh yeah, it was the upstream cat on the bad side (this car has 4 cats & O2 sens) I got interupted writing that last message. (AFing @ work!) I also had a (forgot the P#) "bank 1 and 2 too lean" come in sometime after the P0420 and that was the MAF to the tune of $400. Did not do anything special to the ECM, just disconnected battery overnight and that cured it, CEL went out/stayed out. I also had a bad O2 sensor (4 wire, heated) that kicked on CEL. That was $100 to fix. This Maxima is dependable, its the only car in my fleet that has not left me somewhere, but it is absolutely misreable on the repair end.