P1121 OBD Trouble Code

1 result found

P1121 - GM
Type Powertrain - Manufacturer Controlled DTC - Manufacturer Controlled
Description

TP Sensor Circuit Intermittent High Input Conditions
Cause

Engine running, I AC valve position from 10-30 counts, then the PCM detected an intermittent TP sensor input that was more than 4.70v, condition met for less than one second

Try also: https://www.obd-codes.com/p1121