P244B — Diesel Particulate Filter Differential Pressure Too High (Bank 1)
Category: Powertrain Severity: Medium
Updated:
DTC code P244B means: Diesel Particulate Filter Differential Pressure Too High (Bank 1). It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include dPF clogged with soot from short trips, interrupted regenerations and faulty differential pressure sensor; it's worth confirming the diagnosis before replacing parts.
Possible causes
- DPF clogged with soot from short trips
- Interrupted regenerations
- Faulty differential pressure sensor
- Blocked sensor hose
Symptoms
- DPF warning light
- Loss of power
- Limp mode
- Fan running after shutdown (regeneration)
How to diagnose it step by step
- Read soot load.
- Do a long steady-rpm drive.
- If it doesn't drop, run a forced regeneration.
- Check the differential sensor.
- Clean the DPF if regeneration fails.
How to fix it
Do a 20–30 minute highway drive above 2,000 rpm to allow a regeneration. If that doesn't clear it, run a forced regeneration with a scan tool or have the DPF cleaned.
Estimated repair cost
Forced regeneration: $80–200. Cleaning: $300–600.
Frequently asked questions
What does DTC code P244B mean?
Diesel Particulate Filter Differential Pressure Too High (Bank 1).
Is code P244B serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P244B?
Only to do the regeneration drive; don't ignore it.
Related codes
P244A P2452 P2453 P2458 P2463 P242F
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