P0049 OBD II Trouble Code Turbocharger/Supercharger Turbine Overspeed
Symptoms of P0049 OBD II Trouble Code
- Loud noises from the wastegate and/or hoses especially under acceleration
- Thick black smoke from the exhaust
- Higher engine and/or transmission temperatures
- Spark detonation is possible due to elevated cylinder temperature
- Fouled spark plugs
- Additional codes may also be stored, including other turbocharger boost related codes, knock sensor codes, or engine misfire codes
Common Causes of P0049 OBD II Trouble Code
- Faulty boost pressure sensor
- Bad turbocharger bypass valve, wastegate, or blow-off valve
- Mechanical turbocharger/supercharger failure
- Disconnected, cracked, or collapsed vacuum lines (vacuum actuated bypass valve)
- Disconnected or damaged turbocharger hoses
- Loose, corroded, or disconnected electrical connectors in boost pressure sensor circuits
- Defective PCM, boost controller, or PCM programming error
Severity of P0049 OBD II Trouble Code
A genuine turbocharger/supercharger overboost condition could result in severe FAI device and/or engine damage therefore a stored code P0049 should be treated as severe.