After 36k miles my first CEL
08-11-2008, 02:51 PM
#1
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After 36k miles my first CEL
Out of nowhere, the " drive to workshop" message pops up.
Local indy reads the code and tells me it is O2 sensor related.
He suggests that due to the hot and humid weather we are experiencing, this might just be a fluke. He says the poor air quality has effected other cars. He resets the light and I drive off.
Car feels fine until I go WOT in third. I am showing .7 bars ( Stock k16's with an old fabspeed). Suddenly, the car stops pulling hard. I shift to 4th and punch it. .7 bars and full power. Now I can't stop thinking about it. I try it again. All is well.
I wake up this morning, warm it up and go out to punch that throttle. Same dead spot under WOT- this time in both third and fourth gears. Is this what happens when your 02 sensors go bad?
The CEL has NOT come back on since it was reset. Any thoughts or advice?
Local indy reads the code and tells me it is O2 sensor related.
He suggests that due to the hot and humid weather we are experiencing, this might just be a fluke. He says the poor air quality has effected other cars. He resets the light and I drive off.
Car feels fine until I go WOT in third. I am showing .7 bars ( Stock k16's with an old fabspeed). Suddenly, the car stops pulling hard. I shift to 4th and punch it. .7 bars and full power. Now I can't stop thinking about it. I try it again. All is well.
I wake up this morning, warm it up and go out to punch that throttle. Same dead spot under WOT- this time in both third and fourth gears. Is this what happens when your 02 sensors go bad?
The CEL has NOT come back on since it was reset. Any thoughts or advice?
08-11-2008, 03:08 PM
#2
Professor of Pending Projects
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Rennlist Member
I had the same issue happen to mine ( Stock k16's with Gen3 fabspeed). ... local Porsche dealer did a reset, told me which O2 Sensor gave the fault, and I drove off... lasted a year without coming back. A few months back CEL came back again, same sensor, we did a reset just to validate... sure enough, a few hours later it came back on. Replaced under warranty (CPO).
During that year after the reset I did not notice any difference... could it be you have a separate issue?
Pretty sure someone else will chime in.
During that year after the reset I did not notice any difference... could it be you have a separate issue?
Pretty sure someone else will chime in.
08-11-2008, 08:49 PM
#3
Burning Brakes
The pre-cat O2 sensor is used to titrate the air/fuel ratio over time (long term fuel trim), whereas the post cat sensor is a check to ensure the CAT is working. Having a bad pre-cat o2 might create issues....
Which one was bad based on the code?
(Ya gotta get real codes when you post this stuff...many guys here can give you pretty good advice with definitive codes. Even if you'll use an indy, it can save $$)
How many miles on the plugs? Any mods other than exhaust?
A
Which one was bad based on the code?
(Ya gotta get real codes when you post this stuff...many guys here can give you pretty good advice with definitive codes. Even if you'll use an indy, it can save $$)
How many miles on the plugs? Any mods other than exhaust?
A
08-11-2008, 10:37 PM
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The pre-cat O2 sensor is used to titrate the air/fuel ratio over time (long term fuel trim), whereas the post cat sensor is a check to ensure the CAT is working. Having a bad pre-cat o2 might create issues....
Which one was bad based on the code?
(Ya gotta get real codes when you post this stuff...many guys here can give you pretty good advice with definitive codes. Even if you'll use an indy, it can save $$)
How many miles on the plugs? Any mods other than exhaust?
A
Which one was bad based on the code?
(Ya gotta get real codes when you post this stuff...many guys here can give you pretty good advice with definitive codes. Even if you'll use an indy, it can save $$)
How many miles on the plugs? Any mods other than exhaust?
A