P244B: Diesel Particulate Filter Differential Pressure Too High (Bank 1)
6 vehicles · 5 makes · $100-$3,500 repair
Most Reported On
P244B is an OBD-II diagnostic trouble code meaning “Diesel Particulate Filter Differential Pressure Too High (Bank 1).” This code applies to diesel vehicles and means the engine computer detected that the pressure difference across the diesel particulate filter (DPF) is higher than allowed, indicating the filter is heavily restricted. The DPF traps soot from the exhaust and is periodically cleaned through regeneration. Excessively high differential pressure means too much soot or ash is clogging the filter. This can reduce power, trigger limp mode, and risk damaging the DPF or turbo if ignored, so it should be addressed promptly. This code is most commonly reported on 2010-2020 Land Rover Discovery, 2018-2022 Volkswagen T-Roc (1.6 TDI, 2.0 TDI, 2.0 TDI 4Motion), and 2016-2020 Audi Q2 (TDI diesel), plus 3 other vehicles, with repair costs ranging from $100 to $3,500.
Common Causes
Typical Repair Cost
Based on 6 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
This is a powertrain code, so a basic OBD-II reader can read it. These read P244B.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple code reader for engine (P) codes on many compatible OBD-II vehicles. It does not support every vehicle or hybrid/EV application, and it does NOT read body, chassis or network codes; confirm exact-vehicle compatibility before buying.
- Read & clear engine (P) codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth scanner with a companion app that reads beyond the engine module — ABS, SRS and transmission — plus manufacturer-specific codes on many vehicles.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X V3.0 Elite OBD-II Scanner
by LAUNCH
Handheld scanner covering the four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
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Vehicles Affected (6)
FAQ
What does P244B mean?
P244B stands for "Diesel Particulate Filter Differential Pressure Too High (Bank 1)." This code applies to diesel vehicles and means the engine computer detected that the pressure difference across the diesel particulate filter (DPF) is higher than allowed, indicating the filter is heavily restricted. The DPF traps soot from the exhaust and is periodically cleaned through regeneration. Excessively high differential pressure means too much soot or ash is clogging the filter. This can reduce power, trigger limp mode, and risk damaging the DPF or turbo if ignored, so it should be addressed promptly.
What are the most common causes of P244B?
The most common causes of P244B are: Clogged DPF from soot or ash accumulation, Failed or incomplete regeneration cycles, Faulty DPF differential pressure sensor, Frequent short-trip driving preventing regen, Faulty EGR causing excess soot, Blocked or kinked pressure sensor hoses, Faulty exhaust temperature sensor affecting regen. The specific cause varies by vehicle.
How much does it cost to fix P244B?
Repair costs for P244B range from $100 to $3,500, depending on the vehicle and root cause.
Which vehicles are affected by P244B?
Au7o has documented P244B across 6 vehicle models from 5 manufacturers: Audi, Ford, Land Rover, Renault, Volkswagen.
Sources (9)
- ForumDpf regeneration — Volkswagen T-Roc Forum
- articleVolkswagen T-Roc: Common Problems & Solutions — CarNews
- RecallUK DVSA Audi Q2 2018 Recall Inventory
- articleVolkswagen Touran (2010 – 2015) Review (common problems incl. DPF) – Honest John
- articleVW Touran Mk1 common problems (2003 - 2015) – Haynes Manuals UK
- ForumKoleos 2.0dci 175 problems — Independent Renault Forums
- articleDPF warning light ON in Renault Koleos. What to check? — DailyDriven
- ForumKoleos Diesel DPF Pressure Issue — MyCarly community
- NHTSANHTSA Manufacturer Communications Data Corpus
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.