P244B on Renault: How to Diagnose & Fix
Diesel Particulate Filter Differential Pressure Too High (Bank 1)
1 Renault model · 1 documented issue · $150-$2,200 repair
P244B on Renault by model: symptoms, diagnosis and fix
The 2.0 dCi diesel Koleos (130/150/175 hp variants) is prone to DPF clogging, especially when driven mainly on short, low-speed trips that never allow the filter to reach regeneration temperature. Symptoms include reduced power / limp mode, visible smoke, and a DPF warning light. Faulty differential pressure or exhaust temperature sensors can worsen or falsely trigger the problem, and a botched dealer forced-regeneration has in some cases destroyed the filter outright.
Common Symptoms
- DPF / engine warning light
- Reduced engine power / limp mode
- Excessive exhaust smoke
- Jerking or poor throttle response
- Hard cold starting
- Frequent regeneration cycles
How to Fix
Take the vehicle on periodic longer motorway drives at moderate-to-high RPM to allow passive/active regeneration; verify the differential-pressure and exhaust-temp sensors are working. A clogged filter can often be professionally cleaned (~€100); a destroyed DPF requires replacement (£1,300-£2,000+).
Sources for this issue (3)
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 Renault?
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 Renault it is documented across 1 model: Koleos.
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 Renault?
Published repair estimates on Renault range from $150 to $2,200 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.