P244A — Diesel Particulate Filter Differential Pressure Too Low (Bank 1)
Category: Powertrain Severity: Medium
Updated:
DTC code P244A means: Diesel Particulate Filter Differential Pressure Too Low (Bank 1). It falls under the "Powertrain" category, with an estimated severity of Medium. Common causes include loose or split differential pressure sensor hose, failed differential pressure sensor and cracked or gutted DPF; it's worth confirming the diagnosis before replacing parts.
Possible causes
- Loose or split differential pressure sensor hose
- Failed differential pressure sensor
- Cracked or gutted DPF
- Exhaust leak before the DPF
Symptoms
- Check engine light
- Regenerations not completing
- Possible black smoke
How to diagnose it step by step
- Inspect the sensor hoses.
- Read differential pressure engine-off (≈0) and revved.
- Look for exhaust leaks.
- Replace hoses, sensor or DPF.
How to fix it
Check the differential sensor's two hoses (they crack with heat). If they're fine, check the sensor and the filter condition.
Estimated repair cost
Hoses: $20–80. Sensor: $80–250.
Frequently asked questions
What does DTC code P244A mean?
Diesel Particulate Filter Differential Pressure Too Low (Bank 1).
Is code P244A serious?
Severity Medium. Not urgent, but worth diagnosing to avoid bigger damage.
Can I keep driving with code P244A?
Yes, short term.
Related codes
P244B P2452 P2453 P2458 P2463 P242F
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