P244A on Citroen
Diesel Particulate Filter Differential Pressure Too Low (Bank 1)
P244A on Citroen vehicles indicates diesel particulate filter differential pressure too low (bank 1). Au7o has documented this code across 1 Citroen model — most commonly on C5 Aircross. 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. Typical repair costs on Citroen range from $300 to $2,500, depending on the specific model and root cause.
Common Causes of P244A
- •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
P244A on Citroen by Model
Citroen C5 Aircross(1 issue)
- DPF Regeneration Failure2019-2026
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.
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View P244A across all makes →Frequently Asked Questions
What does P244A mean on 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 specifically, this code is documented across 1 model.
What causes P244A on Citroen vehicles?▼
Common causes on Citroen: 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. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P244A on a Citroen?▼
Repair costs on Citroen range from $300 to $2,500, depending on the specific model and root cause.
Which Citroen models have P244A documented?▼
Au7o has documented P244A on 1 Citroen model: C5 Aircross.