Possible Causes
- Defective mass air flow (MAF) sensor
- Contact resistance in terminals
- Open-circuit in cable for boost pressure reduction from AW 50-42 (Auto. Trans.)
- Blocked hoses between turbocharger and turbocharger control valve or turbocharger control valve and pressure servo
- Defective turbocharger control valve
- Defective boost pressure control valve pressure servo
- Contact resistance in connectors