Throttle/Pedal Position Sensor/Switch F Circuit High
What does P2133 mean?
The P2133 code means the vehicle's onboard diagnostic system has detected: Throttle/Pedal Position Sensor/Switch F Circuit High. This is a critical severity code.
Common Symptoms
- Reduced power warning
- Engine may idle high
- Throttle response limited
- Potential surge at idle
- Check engine light on
Probable Causes (Ranked by Likelihood)
- TPS F signal wire open or shorted to reference voltage Very High
- Disconnected or loose throttle body connector High
- Faulty TPS F sensor (stuck at high voltage) Moderate
- Signal wire shorted to reference wire in harness Moderate
- PCM input circuit pulling signal high Low
Step-by-Step Diagnostic Procedure
-
Verify throttle body connector is securely connected
-
Check TPS F voltage -- should not be at or near 5V when throttle is closed
-
Disconnect throttle body and measure F signal wire -- should not have voltage present
-
Inspect wiring harness for damage where TPS F signal and reference wires run together
-
Replace electronic throttle body if wiring is good and sensor reads incorrectly
Frequently Asked Questions
Can I drive with code P2133?
Only short distances with reduced power. The PCM limits throttle control when TPS F reads abnormally high since it cannot accurately determine throttle position.
Why would TPS F read high with the throttle closed?
A high reading at closed throttle typically means the signal wire is disconnected (floating to 5V reference), shorted to the reference wire, or the sensor element is damaged and stuck at a high output. Check the connector first.
Do I need to do a throttle relearn after replacing the throttle body?
Yes. After replacing the electronic throttle body, you must perform a throttle relearn procedure. This teaches the PCM the new closed and open throttle positions. The procedure varies by manufacturer and often requires a scan tool.