Throttle/Pedal Position Sensor/Switch D Circuit Range/Performance
The P2158 code means the vehicle's onboard diagnostic system has detected: Throttle/Pedal Position Sensor/Switch D Circuit Range/Performance. This is a low severity code.
- 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 D out of expected range Very High
- Worn throttle body mechanism High
- Throttle plate binding Moderate
- TPS D intermittent Low
Step-by-Step Diagnostic Procedure
-
Read TPS D data on scan tool
-
Inspect TPS D wiring
-
Measure TPS D reference voltage
-
Sweep throttle and monitor TPS D for dropouts
Frequently Asked Questions
What does P2158 mean?
P2158 indicates: Throttle/Pedal Position Sensor/Switch D Circuit Range/Performance. The ECM detected an abnormal condition in this sensor circuit.
Is P2158 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.
Sources
This page is built from documented references. Verify against your own service info before repair work.
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