P244B on Volkswagen: Causes, Symptoms, Fix Cost

What does P244B mean on a Volkswagen?

P244B means the differential pressure across the diesel particulate filter is higher than the ECU expects, indicating the filter is heavily loaded with soot. The most common cause is a DPF that has failed to complete its passive regeneration cycle because the vehicle is driven mostly on short urban trips. Less commonly, the pressure sensor itself is reading high, the DPF substrate has melted or cracked internally, or there is a downstream exhaust restriction.

Volkswagen Passat TDI

2008-2024

Passat 2.0 TDI EA189 and EA288 DPFs respond well to forced regeneration on a scan tool. Many independent VAG specialists in Poland and Lithuania offer this service for 60 to 100 euros. Aftermarket type-approved DPF replacements from Klarius or Walker for the Passat run 700 to 1,200 euros parts compared to 1,800 to 2,600 euros at a VW dealer.

What causes P244B on a Volkswagen?

Beyond the generic causes listed on the main P244B page, these are the Volkswagen-specific patterns we see most often:

Volkswagen Passat TDISoot loading on EA189 after software fix from the diesel emissions recall

Volkswagen Passat TDIPressure sensor false high reading on Mk7 Passat (sensor G450 known issue)

How to diagnose P244B on a Volkswagen with OBD2

Follow these steps to pinpoint the root cause of P244B:

Read live data: DPF soot mass (grams), distance since last regeneration, count of completed regenerations, and current differential pressure. A soot mass above 30 to 40 grams with no recent regeneration confirms the filter is overloaded
Before any parts replacement, attempt a forced regeneration with a scan tool that supports it (most independent garages have this capability). A successful forced regen drops the soot mass to under 5 grams and can resolve P244B without further repair, especially on a vehicle that has been driven on short trips
If forced regeneration fails or the soot mass refuses to drop, the DPF is either physically damaged or so loaded that off-vehicle cleaning is needed. Off-vehicle cleaning takes 1 to 2 days at a specialist and saves 60 to 80 percent versus DPF replacement
Compare the differential pressure reading to manufacturer specification at idle. A reading that is high at idle but normal under load points to a faulty sensor rather than a clogged filter. The sensor is far cheaper to replace than the DPF
Inspect the DPF substrate with a borescope through the inlet flange. A cracked or melted substrate is visible and cannot be cleaned, only replaced. Catastrophic regeneration events (often after a misfire or rich condition) destroy the substrate
Confirm there is no downstream restriction by checking the exhaust system from DPF outlet to tailpipe. A collapsed muffler or crushed pipe section will mimic a clogged DPF

How much does P244B cost to fix on a Volkswagen? (EUR)

Estimated repair costs on a Volkswagen (Volkswagen parts and labour typically run 15% above the average for this code).

Repair	Parts Cost	Labor Cost	Total Estimate	DIY Difficulty
Forced active regeneration with scan tool	€0–€35	€69–€230	€69–€265	Professional
Off-vehicle DPF cleaning (ultrasonic or thermal)	€0–€57	€288–€805	€288–€862	Professional
Replace DPF differential pressure sensor	€46–€173	€35–€92	€81–€265	Easy
Replace DPF (aftermarket type-approved)	€690–€1725	€230–€575	€920–€2300	Professional
Replace DPF (OEM)	€1725–€4025	€230–€575	€1955–€4600	Professional

Prices estimated as of May 2026. Costs vary by region, vehicle, and shop.

These codes commonly cluster with P244B on Volkswagen vehicles:

P244AVolkswagen P246FVolkswagen P2002Volkswagen P0299Volkswagen

FAQ: P244B on Volkswagen

What does P244B mean on a diesel?

P244B means too much pressure differential across the diesel particulate filter, which the ECU interprets as a heavily clogged filter. The usual cause is short-trip driving that does not let the DPF reach the temperature needed for self-cleaning regeneration. The filter slowly accumulates soot until the ECU triggers the code.

Can I drive with P244B?

Short distances yes, but treat it as urgent. A clogged DPF restricts exhaust flow, costs you fuel economy, and can damage the turbo if left untreated. Some vehicles drop into limp mode after several drive cycles with P244B active. Fix it within days, not weeks.

Will a forced regeneration fix P244B?

Often yes on a filter that is clogged but not damaged. A forced regeneration at an independent diesel specialist costs 60 to 200 euros and takes around 45 minutes. The technician runs a scan tool command that holds the engine at high RPM until exhaust temperature reaches 600 to 650 degrees Celsius, burning off accumulated soot. If the soot mass refuses to drop or the code returns within a week, off-vehicle cleaning or replacement is needed.

How much does DPF cleaning cost in Europe?

Off-vehicle cleaning at a diesel specialist costs 250 to 700 euros including removal and refitting, and saves 60 to 80 percent versus replacement. Ultrasonic and thermal cleaning processes both work. The job takes 1 to 2 days because the filter sits in the cleaning bath. Polish specialists tend to be the cheapest, German the most expensive, but quality varies by shop.

Why does my DPF keep clogging?

Short-trip driving is the primary cause. The DPF needs around 30 minutes of continuous driving at motorway speed to reach the temperature for passive regeneration. City-only driving never gets there, so the filter relies on active regenerations triggered by the ECU, which only happen when conditions are right. Once a week, take the car on a 30-minute motorway run at 100 km/h or more to let the filter clean itself. This habit alone prevents most P244B cases.

P244B on Volkswagen: Causes, Symptoms and Fix Cost