OBD-II code · Powertrain (generic, extended)
P2C7C Turbocharger Turbine Inlet Valve Supply Circuit Low
The supply voltage to the turbocharger turbine inlet valve actuator is below the expected window. Boost control tracks commanded vs. actual manifold pressure; persistent deviation means wastegate, vanes, hose or actuator are not delivering the requested pressure.
Is it safe to drive with P2C7C?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelySupply fuse blown
- PossibleSupply wire shorted to ground
- Less likelyConnector pins corroded - high contact resistance
Symptoms
- Check engine light on
- Significant power loss / limp mode
- Possible blue or black smoke from exhaust
- Whistling or hissing sound from intake
Repair at a glance
- Difficulty
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 2–8 h
- Emissions test
- Likely to fail
- Parts involved
- Turbo Turbine Inlet Valve, Wiring Harness, Ecm
Related codes
- P2C79NOx Adsorber - Sulfur Limit Exceeded
- P2C7ASCR NOx Catalyst Efficiency Below Threshold Bank 1 Catalyst 2
- P2C7BTurbocharger Turbine Inlet Valve Control Performance
- P2C7DTurbocharger Turbine Inlet Valve Motor Driver High Current
- P2C7ETurbocharger Turbine Inlet Valve Motor Driver Overtemperature
- P2C7FTurbocharger Turbine Inlet Valve Position Sensor Exceeded Learning Limit
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.