P0039

Overview

The P0039 code indicates a turbo/super charger bypass valve control circuit range/performance condition has been detected by the PCM. This code relates to the turbocharger/supercharger system that provides forced induction to increase engine power. Issues with the boost system can result in reduced power, poor fuel economy, and potential turbocharger damage if not addressed.

Symptoms

• Reduced engine power
• Turbo lag or surging
• Check Engine Light (MIL) illuminated
• Oil leak near turbocharger

Common Causes

• Faulty wastegate control solenoid
• Damaged turbo oil supply or return line
• Failed turbocharger boost pressure sensor
• Failed bypass valve or blow-off valve

Diagnosis Steps

1. 1Connect an OBD-II scanner and read all stored trouble codes and freeze frame data
2. 2Inspect all boost hoses and intercooler piping for leaks or disconnections
3. 3Test the boost pressure sensor with a multimeter or scan tool live data
4. 4Check the wastegate and bypass valve for proper operation
5. 5Inspect the turbocharger for shaft play, oil leaks, or damage

Estimated Repair Cost

Commonly Affected Vehicles

Related Codes

More Turbo Codes

Frequently Asked Questions