TheBrettster

Today my service light came on so i hauled over to autozone and scanned it. It came up with P0141 - HO2S Heater Circuit Bank 1 Sensor 2, this is bad o2 sensors correct ? The code came up twice.

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2001 Chevrolet Blazer 4x4 LT
Mods = TPM , Intake , Exhaust , Bearings , Polished Crank , Heavy Duty mounts , Complete rebuild done Oct '07 , HD Sun Shell .
Sound = 4 12" Kicker SoloBarics L7
2000 Watt Performance Teknique Amp x3

MT-2500

Could or could not be a bad sensor.
Remember a code does not say replace sensor . It says check it out.
Check fuse and wiring and plug in and sensor power and ground to heater circuit.

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Remember proper testing gives us the answer to many problems.
MT

TheBrettster

I replaced them and erased the code. It hasn't popped back up.

__________________
2001 Chevrolet Blazer 4x4 LT
Mods = TPM , Intake , Exhaust , Bearings , Polished Crank , Heavy Duty mounts , Complete rebuild done Oct '07 , HD Sun Shell .
Sound = 4 12" Kicker SoloBarics L7
2000 Watt Performance Teknique Amp x3

MT-2500

Thanks for posing back.
Hope all goes well. Sounds like you found the sore spot.
Good luck
MT

__________________
Remember proper testing gives us the answer to many problems.
MT

TheBrettster

Thanks for the help. I was hoping it wasn't anything with the circuit.

__________________
2001 Chevrolet Blazer 4x4 LT
Mods = TPM , Intake , Exhaust , Bearings , Polished Crank , Heavy Duty mounts , Complete rebuild done Oct '07 , HD Sun Shell .
Sound = 4 12" Kicker SoloBarics L7
2000 Watt Performance Teknique Amp x3