Symptoms of P0033 OBD II Trouble Code
- Reduced engine performance
- Whining or rattling noises from the turbocharger or turbo pipes
- Excessive smoke from the exhaust
- Fouled spark plugs
- Elevated engine and/or transmission temperature
- Abnormal hissing noises from the turbocharger wastegate and/or hoses
- Additional codes may also be stored, including turbocharger boost related codes, engine misfire codes, or knock sensor codes
- Due to elevated engine temperatures, cylinder detonation is also a distinct possibility
- If applicable, the boost pressure gauge may also exhibit abnormal levels of boost pressure.
Common Causes of P0033 OBD II Trouble Code
- Bad turbocharger bypass valve actuator
- Defective turbocharger bypass valve
- Disconnected, cracked, or collapsed vacuum line (vacuum actuated bypass valve)
- Faulty boost pressure sensor
- Shorted or open wiring in the boost sensor circuit
- Loose, corroded, or disconnected electrical connectors in the boost sensor reference circuit
- Defective PCM or boost controller.