OBD-II code · Powertrain (generic)
P056F Cold Start Turbocharger Boost Control B Performance
Cold Start Turbocharger Boost Control B Performance: the component is electrically intact but its response does not match the command. This affects turbo/supercharger boost-pressure control.
Is it safe to drive with P056F?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyActuator sticking when cold
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–5 h
- Emissions test
- Likely to fail
- Parts involved
- Turbocharger B, Wastegate B, Vgt Actuator B
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.