P056E
Cold Start Turbocharger Boost Control A Performance
Cold Start Turbocharger Boost Control A Performance: the component is electrically intact but its response does not match the command. This affects turbo/supercharger boost-pressure control.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Symptoms
- Charge status indicator shows fault
- Charging may not start or interrupts
- Slower-than-expected charge rate
Common causes
Ordered by how often each turns out to be the cause.
- Actuator sticking when coldCommon
Parts involved
- Turbocharger A
- Wastegate A
- VGT Actuator A
P056E is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.