OBD-II code · Powertrain (generic, extended)
P246D Particulate Filter Pressure Sensor A and B Correlation
The two DPF differential pressure sensors A and B disagree by more than the diagnostic tolerance - one of them has drifted.
Is it safe to drive with P246D?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyOne sensor has drifted
Symptoms
- Check engine light or DPF warning light on
- Power loss / limp mode
- Increased fuel consumption
- Failed forced regeneration attempts
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Often, with basic tools
- Typical labour
- 0.6–1.8 h
- Emissions test
- Likely to fail
- Parts involved
- Dpf Pressure Sensor A, Dpf Pressure Sensor B
Related codes
- P246AExhaust Gas Temperature Sensor Circuit Intermittent or Erratic Bank 2 Sensor 3
- P246BVehicle Conditions Incorrect for Particulate Filter Regeneration
- P246CParticulate Filter Restriction Forced Limited Power Bank 1
- P246EExhaust Gas Temperature Sensor Circuit Bank 1 Sensor 4
- P246FReductant System Cold Start Performance
- P2470Exhaust Gas Temperature Sensor Circuit Intermittent Bank 1 Sensor 3
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.