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P1133 Diagnostic Trouble Code Discussion for July 2011

Heated Oxygen Sensor (Bank 1 Sensor 1) Insufficient Switching


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Trouble Ticket Help Requests for DTC P1133
Help Request Posted
1995 GMC Jimmy SLE 4.3L Hesitation, Surge, MIL Lamp on VIN: 1GKDT13W4S
P1133: Oxygen sensor B1 heater circuit. This vehicle runs perfect till hot then hesitates and runs rough and bucks.I see a slight fluctuation in the tach at idle hot only.Cleared all codes and code P0341 REPEATED.I've relocated the harness from any RFI.Has anyone ran into this code or fault? Thanks ...
July 25, 2011
1995 GMC Jimmy SLE 4.3L Hesitation, Surge, MIL Lamp on VIN: 1GKDT13W4S
P1133: Oxygen sensor B1 heater circuit. This vehicle runs perfect till hot then hesitates and runs rough and bucks.I see a slight fluctuation in the tach at idle hot only.Cleared all codes and code P0341 REPEATED.I've relocated the harness from any RFI.Has anyone ran into this code or fault? Thanks ...
July 25, 2011