OBD-II code · Powertrain (generic)
P047C Exhaust Pressure Sensor B Circuit Low
Exhaust pressure sensor B below lower plausibility — short to ground. 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 P047C?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyShort to ground
- Less likelyConnector pins corroded - high contact resistance
- Less likelyHarness chafing through insulation
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
- P0472Exhaust Pressure Sensor A Circuit Low
- P0479Exhaust Pressure Control Valve A Intermittent
- P047AExhaust Pressure Sensor B Circuit
- P047BExhaust Pressure Sensor B Circuit Range/Performance
- P047DExhaust Pressure Sensor B Circuit High
- P047EExhaust Pressure Sensor B Circuit Intermittent/Erratic
- P047FExhaust Pressure Control Valve A Stuck Open
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.