OBD-II code · Powertrain (generic)
P047B Exhaust Pressure Sensor B Circuit Range/Performance
Exhaust pressure sensor B reads in range but plausibility check fails. Wiring faults of this kind typically come from chafing, water ingress at connector seals, or pin push-back — a wiggle test on the harness while the code is active often confirms the location.
Is it safe to drive with P047B?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelySensor drift
- Less likelySensor element aged beyond calibration window
- Less likelySensor mounting loose - signal damping
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Exhaust Pressure Sensor
Related codes
- P0471Exhaust Pressure Sensor A Circuit Range/Performance
- P2E55Exhaust Pressure Sensor C Circuit Range/Performance
- P0478Exhaust Pressure Control Valve A High
- P0479Exhaust Pressure Control Valve A Intermittent
- P047AExhaust Pressure Sensor B Circuit
- P047CExhaust Pressure Sensor B Circuit Low
- P047DExhaust Pressure Sensor B Circuit High
- P047EExhaust Pressure Sensor B Circuit Intermittent/Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.