Thread: 02 Sensor codes
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Old 02-03-2010, 02:42 PM   #2
AtomicX
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Quote:
Originally Posted by Th0r View Post
I had a CEL for a month and just figured it was my post-cat 02 since I have no cat converter. Finally hooked a Tech2 up to it and pulled these codes:

P0130 - Circuit Closed Loop (CL) Performance Sensor 1
P0133 - Slow Response Sensor 1

So this in the pre-cat sensor in my header. It's only a month old and I'm not sure how it could be faulty already so I'm not wanting to throw a sensor at it yet. While testing a few other things I noticed that I was only pulling 1.9v from the PCM side O2 harness. Traced the wires as far back as I could and they appear fine. Now I thought normal operating voltage was in the 4-4.5v for the sensor. Is this correct or does the supercharged re-flash change the voltage for any reason?

I had this problem when I installed my Pacesetter header.
To fix it I had to get a heated 02 sensor.
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