02 sensor problem need help
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Teching In
Joined: Aug 2017
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02 sensor problem need help I have an 00 trans am ws6. M6 with kooks long tube headers slp airbox and tune by frost. I recently encountered the fault codes P0131,P0151,P0152.
on start up it drives fine until about a mile down the road it will drop idle real low to about the 400 range when stopped or near stop. Getting on the gas it feels as if it's bottled up and if I get about 3/4 it will clear up but when I change gears the same problem occurs until about 3/4 throttle. After about 10-15 mins of driving it runs like normal and there's no problem what so ever. Now if I turn the car off and on again the cycle repeats itself. I recently replaces the front O2s with Bosch corvette rear O2s and tried and different maf which had no difference. I sprayed starting fluid around to check for air leaks but there was no change. I'm stumped any help would be great.
on start up it drives fine until about a mile down the road it will drop idle real low to about the 400 range when stopped or near stop. Getting on the gas it feels as if it's bottled up and if I get about 3/4 it will clear up but when I change gears the same problem occurs until about 3/4 throttle. After about 10-15 mins of driving it runs like normal and there's no problem what so ever. Now if I turn the car off and on again the cycle repeats itself. I recently replaces the front O2s with Bosch corvette rear O2s and tried and different maf which had no difference. I sprayed starting fluid around to check for air leaks but there was no change. I'm stumped any help would be great.
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P0131 O2 Sensor Circuit Low Voltage Bank 1 Sensor 1
P0151 O2 Sensor Circuit Low Voltage (Bank 2, Sensor 1)
P0152 O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)
https://www.obd-codes.com/p0152
P0151 O2 Sensor Circuit Low Voltage (Bank 2, Sensor 1)
P0152 O2 Sensor Circuit High Voltage (Bank 2 Sensor 1)
https://www.obd-codes.com/p0152
Check the wiring to the o2's to make sure that you didn't fry them on your headers. Did you use o2 extensions? Also check your fuses. The cyclic issue you are having seems to be associated with the car switching from open loop to closed loop which is when the PCM relies on the o2 and maf sensor data.
Thread Starter
Teching In
Joined: Aug 2017
Posts: 2
Likes: 0
Check the wiring to the o2's to make sure that you didn't fry them on your headers. Did you use o2 extensions? Also check your fuses. The cyclic issue you are having seems to be associated with the car switching from open loop to closed loop which is when the PCM relies on the o2 and maf sensor data.
I'm pretty sure the engine sensor fuse feeds ignition power to the o2's and the MAF. I would check all of the fuses while you are at it. I would also check the harness wiring going from the o2's and the MAF to both the PCM and the fuse blocks, either visually or with a voltmeter if you can.
