OBD-II code · Powertrain (generic)
P048C Exhaust Pressure Control Valve A Position Sensor/Switch Circuit Range/Performance
Position sensor 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 P048C?
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
- Best left to a mechanic
- Typical labour
- 0.5–2.5 h
- Emissions test
- Likely to fail
- Parts involved
- Exhaust Pressure Regulator
Related codes
- P048BExhaust Pressure Control Valve A Position Sensor/Switch Circuit
- P0489EGR A Control Circuit Low
- P048AExhaust Pressure Control Valve A Stuck Closed
- P048DExhaust Pressure Control Valve A Position Sensor/Switch Circuit Low
- P048EExhaust Pressure Control Valve A Position Sensor/Switch Circuit High
- P048FExhaust Pressure Control Valve A Position Sensor/Switch Circuit Intermittent/Erratic
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.