P244B on Volkswagen: How to Diagnose & Fix
Diesel Particulate Filter Differential Pressure Too High (Bank 1)
2 Volkswagen models · 2 documented issues · $100-$1,800 repair
P244B on Volkswagen by model: symptoms, diagnosis and fix
T-Roc TDI diesels (1.6 TDI and 2.0 TDI, EA288) used predominantly for short, low-speed trips suffer incomplete DPF (diesel particulate filter) regeneration, leading to soot build-up, the DPF warning light, reduced power/limp mode and increased fuel use. A sticking or carbon-fouled EGR valve worsens soot loading and accelerates filter clogging. AdBlue/SCR sensor or software faults are also reported (warning light failing to clear after a refill). Some 2.0 TDI 4Motion owners report unusually frequent regeneration cycles (every ~120–130 miles).
Common Symptoms
- DPF warning light
- Reduced power / limp mode
- Frequent regeneration cycles
- Increased fuel consumption
- Exhaust smoke
- AdBlue warning not clearing
How to Fix
Drive at sustained motorway speed for 15–20 minutes to allow a full active regeneration. Persistent blockage needs a forced regen, professional DPF clean, or filter replacement; a fouled EGR valve should be cleaned or replaced. AdBlue/SCR faults need sensor replacement or a software update. Avoid DPF delete (illegal for road use in EU/UK and an MOT/TÜV failure).
Sources for this issue (2)
Touran TDI diesels fitted with a DPF are prone to the filter clogging with soot and ash, particularly on cars used for short, low-speed journeys that never reach the temperature needed for regeneration. Ash typically accumulates to problem levels around 80,000-100,000 miles. A blocked DPF triggers a warning light and limp mode; the issue is often compounded by failed glow plugs or software faults that prevent successful active regeneration (fault codes such as 07388 / P2463).
Common Symptoms
- DPF / exhaust emissions warning light
- Glow plug warning light flashing
- Reduced power and limp mode
- Frequent failed regenerations
- Increased fuel consumption and smell of unburnt diesel
How to Fix
Attempt a forced/active regeneration via a long motorway drive or dealer-initiated regen. If the filter is heavily clogged, chemical (off-car) cleaning costs roughly £300-£500; a replacement DPF is around £1,000+. Address contributing faults first (glow plugs, EGR, software update for code 07388/P2463). Regular longer drives prevent recurrence.
Sources for this issue (2)
P244B 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 P244B mean on a Volkswagen?
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. On Volkswagen it is documented across 2 models: T-Roc, Touran.
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 on a Volkswagen?
Published repair estimates on Volkswagen range from $100 to $1,800 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.
Looking for P244B on a different make?
View P244B across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.