P0259high severityPowertrain
Injection Pump Fuel Metering Control 'B' High (Cam/Rotor/Injector)
on 2003 Audi A6 3.0L V6 · AWD
What this code means
The PCM detects a high signal in the diesel injection pump fuel metering control circuit 'B'. Improper fuel metering may result in drivability problems.
Symptoms
- Rough idle
- Reduced power
- Excessive smoke
Common causes
- Faulty metering control valve
- Short to voltage in circuit B
- Open circuit in pump wiring
- Faulty PCM
Diagnostic steps
- Read freeze frame data
- Inspect circuit B for short to voltage
- Test metering valve operation
- Repair circuit or replace pump component
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