P244A: How to Diagnose & Fix — Diesel Particulate Filter Differential Pressure Too Low (Bank 1)
14 vehicles · 9 makes · $100-$4,000 repair
How to diagnose and fix P244A: most-reported vehicles
Ranked by owner reports. Each card gives the symptoms, how to confirm the cause, the fix, parts and sources for that vehicle.
Jaguar XF · 2009–2018
Diesel XF models suffer from DPF regeneration issues, particularly in urban driving where the exhaust never reaches regeneration temperature. The DPF clogs with soot, triggering warning lights and reduced power. Repeated failed regeneration cycles can permanently damage the filter.
Common Symptoms
- DPF warning light on dashboard
- Reduced engine power
- Increased fuel consumption
- Strong diesel smell from exhaust
- Engine management light
How to Fix
Perform a forced DPF regeneration via dealer diagnostic tool. If the DPF is heavily blocked, chemical cleaning or replacement is required. Adopt a driving pattern that includes regular highway runs of 20+ minutes at 2,500+ RPM to allow passive regeneration.
Owner tips & cautions
- TipTake the XF diesel on a 30-minute highway run once a week to allow passive DPF regeneration. Short urban trips are the #1 killer of diesel DPFs.
Mercedes-Benz GLE · 2016–2019
The diesel particulate filter (DPF) clogs prematurely, especially on vehicles used primarily for short trips. Failed regeneration cycles cause reduced power, increased fuel consumption, and eventually limp mode.
Common Symptoms
- Reduced engine power warning
- Increased fuel consumption
How to Fix
Force a DPF regeneration cycle using a diagnostic tool. If the DPF is heavily clogged, a professional cleaning service can restore it for $300-500. In severe cases, DPF replacement runs $2,000-4,000. Drive at highway speed for 30+ minutes regularly to allow passive regeneration.
Owner tips & cautions
- TipTake the GLE diesel on a 30-minute highway drive once a week minimum. Short city trips prevent passive DPF regeneration and lead to premature clogging.
Peugeot 208 · 2012–2026
Diesel 208 models suffer from premature DPF blockage, particularly in vehicles used predominantly for short urban journeys. The DPF cannot complete its regeneration cycle during short trips, leading to progressive soot buildup.
Common Symptoms
- DPF warning light
- Reduced engine power
- Increased fuel consumption
- Strong diesel smell
How to Fix
Perform a forced DPF regeneration using diagnostic equipment. For severely blocked filters, professional DPF cleaning or replacement is required. Advise regular motorway driving to allow passive regeneration.
Sources for this issue (1)
Peugeot 3008 · 2009–2026
Citroen C5 Aircross · 2019–2026
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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?
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.
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?
Repair costs for P244A range from $100 to $4,000, depending on the vehicle and root cause.
Which vehicles are affected by P244A?
Au7o has documented P244A across 14 vehicle models from 9 manufacturers: Citroen, GMC, Jaguar, Mercedes-Benz, Peugeot, Renault, SEAT, Skoda, Volkswagen.
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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.