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P1121 Diagnostic Trouble Code Discussion for September 2006

Electronic Throttle Control Actuator Malfunction


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Trouble Ticket Help Requests for DTC P1121
Help Request Posted
1997 Chevrolet Astro 4.3L Poor Idle Quality, MIL Lamp on VIN: 1GNDM19W1V
P1121: TP Sensor Circuit Intermittent High Voltage. WELL GUYS HERE IS THE PROBLEM. THIS VAN CAME IN WITH THE COMPLAINT THAT THE IDLE WAS TOO HIGH AND CAUSING THE TRANSMISSION TO BANG INTO GEAR & THE SES LIGHT WAS ON. WE ONLY HAD ONE CODE AT THE TIME WHICH WAS FOR A FAULTY PCM. WE INSTALLED A NEW PCM, REPROG...
September 16, 2006