Quote:
Originally Posted by TRP
Hey Blue,
Thanks for the reply.
I guess my question was more wondering how likely is it that these things fail after 39k miles and/or could there something else causing this to read an under temp condition? I get that it's really hard to diagnose/help over a keyboard.
If I'm crawling under there to start poking at wires, I may as well just change the damn sensor 'eh? Buy Bosch? Any reason to go the expensive route (Porsche branded)?
Thank you, again!
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I always go with the simplest things first and work step by step to the most complex.
It could be a simple wiring issue.
There are only two wires involved in the heater circuit on a four wire o2 sensor they are most always the same color.
They can be tested with a digital volt meter.
One will be ground.
One will have voltage with key on.
You should be able to back probe at the connector nearest the sensor.
Simple 5 minutes work. Ok 10 minutes you will want to raise the car.
If there is a wiring issue and you replace the sensor without fixing the wiring issue you with throw the code again.
Replacing the sensor without testing the wiring is possibly money spent needlessly.