OBD-II code · Powertrain (generic)
P048F Exhaust Pressure Control Valve A Position Sensor/Switch Circuit Intermittent/Erratic
Position sensor signal jumps or drops out intermittently. 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 P048F?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyIntermittent connector
- Less likelyConnector with intermittent contact under vibration
- Less likelyHarness routed against vibrating component
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
- P048CExhaust Pressure Control Valve A Position Sensor/Switch Circuit Range/Performance
- P048DExhaust Pressure Control Valve A Position Sensor/Switch Circuit Low
- P048EExhaust Pressure Control Valve A Position Sensor/Switch Circuit High
- P0490EGR A Control Circuit High
- P0491Secondary Air Injection System Insufficient Flow (Bank 1)
- P0492Secondary Air Injection System Insufficient Flow (Bank 2)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.