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P1133 Diagnostic Trouble Code Discussion for September 2005

Heated Oxygen Sensor (Bank 1 Sensor 1) Insufficient Switching

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Trouble Ticket Help Requests for DTC P1133
Help Request Posted
1997 Chevrolet Blazer 4.3L Excessive Emissions, Poor Idle Quality, Hesitation, Cuts out, Misfire, Poor Fuel Economy, MIL Lamp on VIN: 1GNDT13WXV
P1133: Heated Oxygen Sensor (Bank 1 Sensor 1) Insufficient Switching. vehicle idles poorly. starts to stink from running over rich in exhaust. lacks power. scanner shows missfire on cylinders 1,3,&5. no indication of regulator leaking. from experience this usually causes 2,4,6 cyl to missfire. fuel pressure does not leak dow...
September 19, 2005
2001 Isuzu Rodeo LS 3.2L MIL Lamp on VIN: 4S2DM58W51
P1133: Heated Oxygen Sensor (Bank 1 Sensor 1) Insufficient Switching. Vehicle sets code p1133 Checked sensor operation with scan tool responds slowly with low voltage then after driving 10 to 15 minuts or sometimes after driving and stopping and restarting the engine the o2 sensor will operate normally. Ihave followed flow chart...
September 19, 2005