P006FTurbocharger/Supercharger Boost Control A Supply Voltage Circuit High
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- "Boost control A" is the electrically driven actuator the engine control module uses to set boost pressure, for example a wastegate solenoid, the control valve of variable turbine vanes or an electric actuator. Some engines supply it through two driver stages in the control module: a high side that switches the supply voltage and a low side that switches ground. The low side is covered by P0045 to P0048; this code concerns the high side. P006F is set when the voltage on the supply circuit is too high, typically because the supply wire is shorted to battery voltage, so the control module can no longer switch the actuator off. Without supply the actuator stays in its rest position, which on most engines means low boost and reduced power.
- What you may notice
- Check engine light on
- Loss of power or reduced power mode
- Weak acceleration, noticeable turbo lag
- Likely causes
- LikelySupply wire shorted to battery voltage
- PossibleWater or corrosion in the connector
- PossibleInternal fault in the actuator
- RareHigh-side driver in the engine control module faulty
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €50 – €900
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.