Powertrain
generic / SAE
P0249
Turbocharger/Supercharger Wastegate Actuator B Low
Wastegate actuator B control voltage below expected range. Boost control tracks commanded vs. actual manifold pressure; persistent deviation means wastegate, vanes, hose or actuator are not delivering the requested pressure.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number2 / 49
Possible causes
- Wiring shorted to ground high
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 80–600 €
- Estimated time: 0.5–3 h
- Component: wastegate actuator b
- Component: actuator wiring
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012