P1549 — Volkswagen — Boost Pressure Control Valve Open Short To Ground
P1549 (Volkswagen): Boost Pressure Control Valve Open Short To Ground — what it means, the affected system and what to check before replacing parts.
Meaning, symptoms, causes and checks
Boost Pressure Control Valve Open Short To Ground. Source catalogue definition; confirm applicability using vehicle service information.
Affected system: Powertrain
Symptoms
- Check Engine light illumination
- Noticeable loss of engine power
- Engine entering limp mode
- Fluctuating turbo boost pressure
Possible causes
- Short circuit to ground in the boost pressure control valve wiring
- Defective boost pressure control solenoid
- Faulty boost pressure control valve internal actuator
- Damaged engine control module (ECM) output driver
What to check
- Inspect the wiring harness and connectors for the boost pressure control valve for chafing or signs of a short to ground
- Test the resistance of the boost pressure control valve solenoid using a multimeter
- Verify the ground circuit continuity for the solenoid circuit
- Check for battery voltage at the solenoid connector with ignition on
- Clear the diagnostic trouble code and perform a road test to verify the fault