P0133, where to start?
#1
P0133, where to start?
Got this code and did a search here on the forum and turned up only a couple results, so I assume its a rare code. I swapped the new AC Delco O2 sensors from passenger to driver and cleared the code but it came back. No worries, I assume its a wiring problem. Which wires do I need to start testing on the wiring harness and what should the results be? If I am heading in the wrong direction on fixing this problem well by all means, turn me around! I have found threads about testing the O2 sensor, but I THINK I need to be testing the wires going to the O2 sensor, so that is the measurements I need. Rear O2s deleted if that helps. Thanks everyone!
Last edited by ascastil; 10-27-2012 at 03:58 AM.
#2
Re: P0133, where to start?
This thread I found sounds like the best info. Maybe you already read it, but if after headers installation, it could be your problem.
https://www.camaroz28.com/forums/lt1...nstall-416735/
https://www.camaroz28.com/forums/lt1...nstall-416735/
#4
Re: P0133, where to start?
The speed of the sensor's reaction to O2 level changes might be affected by loss of the heating element. But a circuit problem on the heater would set P0135. Might be worth verifying you have 12V to the heater circuit, at the O2 sensor harness connector.
#5
Re: P0133, where to start?
I am pretty sure I cleared the code and switched sides with the sensors. Started getting the code after h/c swap and dyno tune. The sensors are brand new, I bought them specifically for the dyno tune. It did run off the charts rich before the tune, I did drive it to the shop like that. Any way that drive coulda ruined the o2s on the trip down there? Should I buy a set of o2s and give that a try?
Oh, I already forgot about checking the voltage. Which wire is for the heater?
Oh, I already forgot about checking the voltage. Which wire is for the heater?
Last edited by ascastil; 10-27-2012 at 01:02 PM.
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