P0250moderate severityPowertrain
Turbocharger/Supercharger Boost Control B Circuit High
on 2003 Audi A6 3.0L V6 · AWD
What this code means
The PCM detected a high voltage or signal in the boost control 'B' circuit. This typically means a short to power or an open circuit.
Symptoms
- Erratic boost control
- Reduced engine power
- Check engine light on
Common causes
- Short to voltage in circuit
- Faulty boost control solenoid
- Corroded connector
- Open circuit fault
Diagnostic steps
- Read stored codes
- Check circuit for short to power
- Inspect connectors and wiring
- Test and replace solenoid as needed
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