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Record for longest time w/o CEL?

oy ... holy old thread bump. Didn't see that.
I'll go sit in my corner now.. :blackeye:
 
Mine's been on since July... Long story short, car has headers, was tuned, chip got knocked out of the PCM, car is no longer a DD and I haven't had the cash to buy an Xcal3 to put my tune on...

Mystique had one when I got it, CEL for o2 sensor... Nothing a sensor from the JY didn't fix though... ;)
 
I won't jinx myself. All I will say is that I'm the original owner of my 99 SVT (only 43K though).
 
In six years with my 95, only had 1 for the MAF. So far with the SVT over the past year & 4 months, none.
 
Jeez, this thread was dead for 14 months! SVT24V brought it back to life yesterday morning. I read the post and driving home from work I got my first ever CEL since owning my car.

Jinx, jinx, jinx
anybody reading this post be careful, it might be catching hahaha
 
My CEL has been going on and off ever since I started this thread last year. It has been on steadily for the last few months. I'll have to take the car in for its smog test next Spring, and they'll flunk you (without even bothering to do the tailpipe test) and send you on your way if your CEL is on. I think I heard on here that if you disconnect your battery overnight, the CEL will reset? Has anyone tried this? With any success? I'd like to do that the night before I take it to be smogged.... (BTW, it showed a P0420 when I had it scoped. It runs great and I consistently get around 27 mpg under primarily highway driving.)
 
If you reset the CEL it will also show up in the test so that won't work. You could just change the o2 sensor on bank 1. P0420----Catalyst System Efficiency below Limit - Bank No 1. Rear bank.
 
well if you reset the pcm it takes time for all of the self tests to run. so if you reset the pcm and go straight to test you are not going to pass. you may pass if enough of the tests complete before you get a pending or active cel code.

now a P0420 is a pre-cat code. if you do not have a O2 sensor code on bank one then changine the O2 sensor isn't going to do anything. If you want to try it swap the downstream O2 sensors. if it is indeed a O2 sensor problem you will then get a P0430 instead of a P0420.

sounds like in this case the P0420 is a false code. you have some options. for ~$200 a dealer can reprogram the PCm to widen the limits that set this code. or you can buy mil-eliminators (~$60) or make your own (~10?) and this will prevent the code.
 
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