OBD-II code · Powertrain (generic)
P04A7 Exhaust Pressure Control Valve B Position Sensor Circuit Range or Performance
Same as P04A6 with the signal in plausible range but not matching the actual valve angle.
Is it safe to drive with P04A7?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor element drifted or offset
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.8–2 h
- Emissions test
- Likely to fail
- Parts involved
- Exhaust Pressure Position Sensor B
Related codes
- P04A4Exhaust Pressure Control Valve B Stuck Open
- P04A5Exhaust Pressure Control Valve B Stuck Closed
- P04A6Exhaust Pressure Control Valve B Position Sensor Circuit
- P04A8Exhaust Pressure Control Valve B Position Sensor Circuit Low
- P04A9Exhaust Pressure Control Valve B Position Sensor Circuit High
- P04AAExhaust Pressure Control Valve B Position Sensor Circuit Intermittent or Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.