P2154 low

Throttle/Pedal Position Sensor/Switch C Circuit Range/Performance

The P2154 code means the vehicle's onboard diagnostic system has detected: Throttle/Pedal Position Sensor/Switch C Circuit Range/Performance. This is a low severity code.

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Keep driving?: Yes, but fix soon
DIY difficulty: moderate
Estimated cost: $80 - $400 (parts and labor)

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Common Symptoms

Check Engine Light on
Erratic throttle response
Engine may enter limp mode
Reduced power warning
Poor acceleration response

Probable Causes (Ranked by Likelihood)

TPS C out of expected range Very High
Worn throttle body mechanism High
Throttle plate binding Moderate
TPS C intermittent Low

Step-by-Step Diagnostic Procedure

Read TPS C data on scan tool
Inspect TPS C wiring
Measure TPS C reference voltage
Sweep throttle and monitor TPS C for dropouts

Frequently Asked Questions

What does P2154 mean?

P2154 indicates: Throttle/Pedal Position Sensor/Switch C Circuit Range/Performance. The ECM detected an abnormal condition in this sensor circuit.

Is P2154 serious?

Low severity, but should be repaired to maintain proper engine management.

What should I check first?

Start with a visual inspection of the sensor wiring and connector. Use a scan tool to read sensor data and compare to expected values. Check reference voltage (typically 5V) at the sensor connector.