Powertrain
generic / SAE
P04A6
Exhaust Pressure Control Valve B Position Sensor Circuit
A circuit fault is detected on the position sensor of exhaust pressure control valve B. Without valid position feedback the ECU cannot run closed-loop control of the valve and falls back to a default substitute.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number4 / A6
Possible causes
- Open in sensor signal, supply or ground high
Inspection / repair
- Difficulty: medium
- DIY: possible
- Estimated cost: 150–500 €
- Estimated time: 0.8–2 h
- Component: exhaust pressure position sensor b
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012