P1121 Diagnostic Trouble Code Discussion for April 2006
Electronic Throttle Control Actuator Malfunction
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| Help Request | Posted | |
| 1999 Chevrolet Express 3500 5.7L Excessive Emissions, Poor Idle Quality, Hesitation, Surge, Misfire, Poor Fuel Economy VIN: 1GTHG39R8X P1121: TP Sensor Circuit Intermittent High Voltage. after these repairs, no codes came back and vehicle had lots of power, ran well for 3 days, returned with no power and a code for bank 1 sensor 1 not switching, hooked up scanner ,vehicle immediately started running well, road tested, still running well, no co... |
April 13, 2006 |
