P0033

Overview

The P0033 code indicates a turbo/super charger bypass valve control circuit 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

• Whining or whistling noise from turbo
• Oil leak near turbocharger
• Loss of boost pressure
• Check Engine Light (MIL) illuminated

Common Causes

• Faulty turbocharger wastegate
• Damaged turbo oil supply or return line
• Faulty wastegate control solenoid
• Worn or damaged turbocharger bearings

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