P244B on Audi: How to Diagnose & Fix
Diesel Particulate Filter Differential Pressure Too High (Bank 1)
1 Audi model · 1 documented issue · $200-$2,000 repair
P244B on Audi by model: symptoms, diagnosis and fix
Q2 TDI diesels (1.6 TDI / 2.0 TDI) suffer from DPF clogging when the car is mostly used for short, low-speed urban journeys. The soot filter never reaches the exhaust temperature needed to complete a passive/active regeneration, so soot accumulates, the DPF warning light comes on, and the car may enter a forced-regen cycle or limp mode. Repeated interrupted regens (driver slowing/stopping before the cycle finishes) make it worse and can dilute engine oil with diesel.
Common Symptoms
- DPF / exhaust-emissions warning light on
- Reduced power / limp mode
- Frequent regenerations, increased fuel use
- Rising engine oil level (diesel dilution)
How to Fix
Drive at a steady speed (>60 km/h / ~40 mph) under moderate load for 15–30 minutes to allow regeneration to complete; if blocked, the dealer performs a forced/static regeneration with diagnostic equipment. Severely blocked filters need professional DPF cleaning or replacement. Long-term: avoid exclusively short trips.
Sources for this issue (1)
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 Audi?
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 Audi it is documented across 1 model: Q2.
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 Audi?
Published repair estimates on Audi range from $200 to $2,000 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.