P244A on Citroen: How to Diagnose & Fix
Diesel Particulate Filter Differential Pressure Too Low (Bank 1)
1 Citroen model · 1 documented issue · 1 critical · $300-$2,500 repair
P244A on Citroen by model: symptoms, diagnosis and fix
The C5 Aircross BlueHDi engines experience DPF regeneration failures in urban driving conditions. The larger SUV body and heavier weight mean the engine works harder yet rarely reaches optimal regeneration temperatures in city traffic.
Common Symptoms
- DPF warning light
- Reduced power
- Limp mode
- Failed regen attempts
How to Fix
Force DPF regeneration via diagnostic tool. Ensure the Eolys additive is topped up at each service. Incorporate regular sustained motorway driving into the vehicle usage pattern.
P244A code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P244A mean on a Citroen?
P244A stands for "Diesel Particulate Filter Differential Pressure Too Low (Bank 1)." P244A is a diesel emissions code meaning the differential pressure across the diesel particulate filter (DPF) on bank 1 is too low. A pressure sensor measures the difference between the DPF inlet and outlet to gauge how loaded with soot the filter is; an abnormally low reading suggests the filter isn't restricting flow as expected. This can indicate a cracked, missing, or hollowed-out DPF substrate, or a sensor/hose problem giving a false low reading. It points to the DPF or its differential pressure sensing system rather than the engine itself. On Citroen it is documented across 1 model: C5 Aircross.
What are the most common causes of P244A?
The most common causes of P244A are: Cracked, damaged, or failed (hollow) DPF substrate, Faulty DPF differential pressure sensor, Disconnected, cracked, or leaking pressure sensor hoses, Clogged or blocked pressure sensor reference lines, Exhaust leak upstream or around the DPF, Aftermarket or tampered/removed DPF, Wiring or connector fault at the pressure sensor. The specific cause varies by vehicle.
How much does it cost to fix P244A on a Citroen?
Published repair estimates on Citroen range from $300 to $2,500 depending on the model and root cause. If an issue mentions a recall or campaign, check your VIN with the manufacturer or NHTSA and confirm eligibility and coverage with a dealer.
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Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.