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P1133 Diagnostic Trouble Code Discussion for July 2006

Heated Oxygen Sensor (Bank 1 Sensor 1) Insufficient Switching

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Trouble Ticket Help Requests for DTC P1133
Help Request Posted
1999 Chevrolet Malibu 3.1L Poor Idle Quality, Hesitation, Surge, Cuts out, Stall, MIL Lamp on VIN: 1G1ND52J9X
P1133: Oxygen Sensor (Bank 1 Sensor 1) Insufficient Switching. The car came in on Friday with an Ho2s code. Replaced the o2 sensor, cleared the MIL and that car acted better. It came back yesterday with codes po131 & po1133 and the car was running like crap. I have power in the 4 prong connector in a dark brown wire. ...
July 19, 2006
1995 Chevrolet Blazer 4.3L Excessive Emissions, Poor Fuel Economy, MIL Lamp on VIN: 1GNDT13W1S
P1133: slow or no switching of O2. Helping out the shop foreman here, and hoping to show him the value of IATN at the same time. We suspect a wiring problem. I read thru the archives and found many emissions problems, but none with these codes. We have inspected the wire harness, and are about ...
July 20, 2006