P2138

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

1. Check error codes and sensor data with a scanner
2. Inspect the wiring and sensor connectors
3. Clean the throttle valve with a special cleaner
4. Check resistance and sensor signals
5. If necessary, replace the throttle position sensor

Related codes

Error P2138 by Vehicle Brand