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BMW 328i driver terrain malfunction advice needed - Facebook
The physical wastegate flap inside the turbo is stuck, damaged, or has too much play.
The car's computer (DME) is trying to "learn" the closed position of the wastegate valve. The measured closed position is outside the acceptable tolerance, indicating it is not sealing or moving properly. Common Causes: 123432
Faults can sometimes trigger after a complete disconnection of the battery.
Corroded, damaged, or loose connectors between the actuator and the engine computer. BMW 328i driver terrain malfunction advice needed -
The emissions warning light illuminates. Cold Start Noise: Noise 20-30 seconds after start-up. Common Associated Codes
The actuator motor itself is failing.
The turbo has been overheating, causing the wastegate flap seat to become loose and move.
