OBD-II code · Powertrain (generic)
P048D Exhaust Pressure Control Valve A Position Sensor/Switch Circuit Low
Exhaust Pressure Control Valve A Position Sensor/Switch Circuit Low: the signal voltage is below the expected range. Often a short to ground or high resistance in the wiring.
Is it safe to drive with P048D?
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
- 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
- P048AExhaust Pressure Control Valve A Stuck Closed
- P048CExhaust Pressure Control Valve A Position Sensor/Switch Circuit Range/Performance
- P048EExhaust Pressure Control Valve A Position Sensor/Switch Circuit High
- P048FExhaust Pressure Control Valve A Position Sensor/Switch Circuit Intermittent/Erratic
- P0490EGR A Control Circuit High
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.