Diagnostic Trouble Code
P0122 — Throttle Position Sensor A — Circuit Low Input
Throttle Position Sensor A — Circuit Low Input
Definition
The ECM is reading a voltage from throttle position sensor A that is below the minimum threshold (typically below 0.2V). This usually indicates an open circuit, ground short, or complete sensor failure.
Common Causes
- Failed throttle position sensor
- Open or shorted wiring in the TPS signal circuit
- Poor ground connection at the TPS
- Corroded connector pins