OBD-II code guide
P0122 Throttle Position Sensor Circuit Low
P0122 means the throttle position sensor signal is lower than expected.
What it means
The computer may think the throttle is more closed than it really is.
Common symptoms
- Poor acceleration
- Reduced power
- Stalling
- High or low idle
- Check engine light
Likely causes
- Throttle sensor fault
- Short to ground
- Open reference voltage circuit
- Connector problem
- Throttle body issue
First checks
- Inspect connectors and wiring.
- Check for 5-volt reference issues.
- Scan live throttle position data.
- Avoid replacing parts before checking circuit faults.