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P1121 Diagnostic Trouble Code Discussion for October 2007

Electronic Throttle Control Actuator Malfunction

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Trouble Ticket Help Requests for DTC P1121
Help Request Posted
1999 Oldsmobile Alero GLS 3.4L No Start, Poor Idle Quality, Stall VIN: 1G3NF12E0X
P1121: TP Sensor Circuit Intermittent High Voltage. This car has a whole host of symptoms that occur intermittently. At times it won't start, or dies when running. Sometimes it idles normally, other times it idles above 2500 rpm. It had a whole list of codes when we first got it in, and the ones I listed return...
October 18, 2007