P2138 — Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation
Category: Powertrain Severity: High
Updated:
DTC code P2138 means: Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation. It falls under the "Powertrain" category, with an estimated severity of High. Common causes include failed accelerator pedal sensor, corroded pedal connector and damaged wiring; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Failed accelerator pedal sensor
- Corroded pedal connector
- Damaged wiring
- ECU fault
Symptoms
- Limp mode
- No or slow throttle response
- Check engine light
How to diagnose it step by step
- Check the pedal connector.
- Compare tracks D and E.
- Measure references and grounds.
- Replace the pedal.
How to fix it
Tracks D and E usually belong to the accelerator pedal. Check its connector and, if it's fine, replace the pedal assembly.
Estimated repair cost
Accelerator pedal: $100–300.
Frequently asked questions
What does DTC code P2138 mean?
Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation.
Is code P2138 serious?
Severity High. Have it checked as soon as possible, especially if it affects safety or the catalytic converter.
Can I keep driving with code P2138?
Only as needed.
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