Throttle Position Sensor / Switch A Circuit Malfunction
The ECU detects a general electrical fault on the throttle position sensor/switch A circuit. Signal missing, implausible, or wiring broken. Generic catch-all when no more specific TPS-A code applies.
Affected components
- Throttle position sensor
- Tps wiring
- Tps connector
- Throttle body
Common causes
- High likelihood: TPS worn or failed (dead spot in resistive track)
- Medium likelihood: TPS wiring or connector fault
- Low likelihood: TPS mechanically misaligned to throttle shaft
Possible symptoms
- Check engine light on
- Reduced throttle response, possible limp mode
- Hesitation or surging
- Idle too high or too low
Diagnostic notes
- The malfunction indicator lamp may illuminate
- This code can affect emissions
- A drive cycle may be required after repair
- Reduced-power or limp mode may occur
Sources
Diagnostic information is provided for reference only. Confirm the code with a compatible scan tool and follow the vehicle manufacturer's service procedures before replacing components.