2002 Chevrolet Trailblazer LS 4.2L Throttle
Hello everyone, we have this 2002 Trailblazer that keeps coming back with fault codes (P1221 excessive difference between throttle position sensors, P1271 excessive difference between acceleator pedal position sensors, P1635 5v ref. A circuit) The first time w...
Summary posted 3/21/2006
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Vehicle Data2002 Chevrolet Trailblazer LS
Trouble Codes
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Message Closed w/Summary
Vehicle Data
2002 Chevrolet Trailblazer LS
VIN | 1GNDT13S02 |
Engine | 4.2 L / 6 cyl / GAS |
Trans | 4-speed Automatic (Electronic) |
Delivery | FI / sefi |
Emissions | OBD-II Compliant |
Symptoms | Throttle |
Occurs | Intermittently |
Trouble Codes
P1221 | TP Sensor 2 1-2 Correlation |
P1271 | Accelerator Pedal Position Sensor 1-2 Correlation |
P1635 | 5-Volt Reference 'A' Circuit Malfunction |