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P244A: meaning, causes and solutions
- 22 August 2026
- OBD Fault Codes
- Posted by MasterTuning
- Comments Off on P244A: meaning, causes and solutions
Fault code P244A means particulate filter differential pressure too low. The pressure difference between the DPF inlet and outlet is lower than expected: often the problem is in the sensor or its pipes, not in the filter.
Typical symptoms
- Engine light on
- Regenerations not started
- No obvious driving symptoms
Most common causes
- Differential sensor pipes disconnected, holed or swapped
- Faulty differential pressure sensor
- Particulate filter hollowed out or removed
- Exhaust leaks before the filter
How it is checked in diagnosis
- Comparing measured and expected pressure at idle and under load
- Inspection of the silicone pipes (often cracked by heat)
- Sensor substitution test
Can you drive with code P244A?
Yes, but without correct regenerations the filter loads up over time.
How MasterTuning helps
We read the real values from the ECU, not just the code: that is the difference between identifying the component responsible and replacing parts by trial and error. After the repair we clear the fault and check that it does not come back. Centres throughout Italy.
Do you have code P244A on your car? Book a diagnosis at your nearest MasterTuning centre.
Frequently asked questions
What does fault code P244A mean?
Code P244A means particulate filter differential pressure too low. The pressure difference between the DPF inlet and outlet is lower than expected: often the problem is in the sensor or its pipes, not in the filter.
Can you drive with fault P244A?
Yes, but without correct regenerations the filter loads up over time.
Is clearing code P244A enough to fix it?
No: if the cause is still present the code comes back after a few kilometres. Clearing should only be done after the repair, with the diagnostic tool.
How much does it cost to fix code P244A?
It depends on the component responsible: the diagnosis is precisely what identifies it with real measurements, avoiding unnecessary replacements that cost far more than the correct repair.
