Chevrolet P2138 Error Code: How to Fix It

Q: Can I drive with P2138 error code?

You should avoid driving with P2138 as it can cause sudden loss of power or unpredictable throttle response, creating unsafe driving conditions. Have it diagnosed immediately.

Q: How much does it cost to fix P2138?

Costs range from $50-150 for cleaning and minor repairs, up to $300-800 if throttle body replacement is needed. Professional diagnosis typically costs $100-150.

Q: What causes P2138 in Chevrolet vehicles?

Common causes include dirty throttle body, corroded electrical connections, damaged wiring harness, or a failing throttle position sensor within the throttle body assembly.

Q: Will P2138 cause my car to not start?

P2138 may prevent starting or cause the engine to start but immediately go into limp mode with severely reduced power for safety reasons.

Abstract

The P2138 error code indicates a voltage correlation problem between throttle position sensors 1 and 2 in your Chevrolet's electronic throttle control system. This serious issue can cause reduced engine power, rough idling, or even prevent your vehicle from starting safely.