P0123Severity: Medium
P0123 – Throttle Position Sensor (TPS) High Input
The throttle/pedal position sensor reports a high signal.
What it means
The TPS voltage is higher than expected. A false high reading can cause unexpected throttle response and limp mode.
Symptoms
- Erratic throttle response
- High idle
- Limp mode
- Check-engine light
Common causes
- Faulty TPS sensor
- Wiring short
- Connector issue
- Supply voltage fault
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Frequently asked questions
What does trouble code P0123 mean?
P0123 – Throttle Position Sensor (TPS) High Input. The TPS voltage is higher than expected. A false high reading can cause unexpected throttle response and limp mode.
Can I drive with a P0123 code?
You can usually drive short distances, but it's best to have it checked before it gets worse.