P2138
Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation
P2138 is an OBD-II diagnostic trouble code meaning: Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation. Common causes: throttle position sensor malfunction, problems with wiring or contacts. Estimated repair cost: $28–89.
Symptoms
- Check Engine light comes on
- The engine goes into emergency mode
- Loss of power during acceleration
- Unstable idle speed
- The car may jerk when you press the gas pedal
Causes
- Throttle Position Sensor Malfunction
- Problems with wiring or contacts
- Mechanical damage to the throttle assembly
- Throttle valve contamination
- Accelerator pedal malfunction (in drive-by-wire systems)
How to Fix
- Check error codes and sensor data with a scanner
- Inspect the wiring and sensor connectors
- Clean the throttle valve with a special cleaner
- Check resistance and sensor signals
- If necessary, replace the throttle position sensor
Related codes
Error P2138 by Vehicle Brand
FAQ
What does the P2138 code mean?
P2138 is an OBD-II diagnostic trouble code that indicates: Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation
What causes a P2138 error code?
The most common causes of P2138 include: Throttle Position Sensor Malfunction; Problems with wiring or contacts; Mechanical damage to the throttle assembly; Throttle valve contamination.
How do I fix a P2138 diagnostic trouble code?
To fix P2138: Check error codes and sensor data with a scanner. Inspect the wiring and sensor connectors. Clean the throttle valve with a special cleaner. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with P2138?
Limited driving only, diagnose soon
How much does it cost to fix P2138?
The estimated repair cost for P2138 is $28–89. Actual cost depends on your vehicle, location, and labor rates.
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