OBD-II code · Powertrain (generic, extended)
P244A Diesel Particulate Filter Differential Pressure Too Low
The differential pressure across the DPF is below the calibrated minimum even at higher loads. Often a sign of a damaged or missing filter substrate, or a leak in the sensing line.
Is it safe to drive with P244A?
The car may go into limp mode (reduced power). Get it diagnosed before a long trip.
Common causes
- Most likelyCracked or missing DPF substrate
- PossibleLeak in pressure sensing line
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
- Hard
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1.5–6 h
- Emissions test
- Likely to fail
- After the fix
- A drive cycle is needed before the light stays off
- Parts involved
- Diesel Particulate Filter, Dpf Diff Pressure Sensor
Related codes
- P2447Secondary Air Injection Pump Stuck On (Bank 2)
- P2448AIR System High Air Flow Bank 1
- P2449AIR System High Air Flow Bank 2
- P244BDiesel Particulate Filter Differential Pressure Sensor Offset
- P244CExhaust Temperature Too Low For Particulate Filter Regeneration Bank 1
- P244DExhaust Temperature Too High For Particulate Filter Regeneration Bank 1
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.