P244A on Volkswagen
Diesel Particulate Filter Differential Pressure Too Low (Bank 1)
P244A on Volkswagen vehicles indicates diesel particulate filter differential pressure too low (bank 1). Au7o has documented this code across 3 Volkswagen models — most commonly on T-Roc, Touareg, Touran. P244A is a diesel emissions code meaning the differential pressure across the diesel particulate filter (DPF) on bank 1 is too low. A pressure sensor measures the difference between the DPF inlet and outlet to gauge how loaded with soot the filter is; an abnormally low reading suggests the filter isn't restricting flow as expected. This can indicate a cracked, missing, or hollowed-out DPF substrate, or a sensor/hose problem giving a false low reading. It points to the DPF or its differential pressure sensing system rather than the engine itself. Typical repair costs on Volkswagen range from $100 to $2,500, depending on the specific model and root cause.
Common Causes of P244A
- •Cracked, damaged, or failed (hollow) DPF substrate
- •Faulty DPF differential pressure sensor
- •Disconnected, cracked, or leaking pressure sensor hoses
- •Clogged or blocked pressure sensor reference lines
- •Exhaust leak upstream or around the DPF
- •Aftermarket or tampered/removed DPF
- •Wiring or connector fault at the pressure sensor
P244A on Volkswagen by Model
Volkswagen T-Roc(1 issue)
- TDI diesel DPF clogging / EGR contamination on short journeys2018-2022
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).
Volkswagen Touareg(1 issue)
- DPF Clogging and EGR-Induced Limp Mode (diesel)2007-2018
Diesel Touaregs used mostly for short, low-speed trips suffer diesel particulate filter (DPF) soot accumulation because the engine rarely reaches the temperature needed for passive regeneration. Compounding this, EGR faults (sticking/clogged EGR valve, failed differential pressure or exhaust temperature sensors) prevent the regeneration cycle from completing. The result is rising backpressure, increased fuel consumption, loss of power, DPF warning light, and eventually limp mode. Owners report that once one satellite sensor in the regen chain fails, regeneration stops entirely and the DPF clogs.
Volkswagen Touran(1 issue)
- Diesel Particulate Filter (DPF) Clogging on TDI Models2009-2018
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).
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View P244A across all makes →Frequently Asked Questions
What does P244A mean on Volkswagen?▼
P244A stands for "Diesel Particulate Filter Differential Pressure Too Low (Bank 1)." P244A is a diesel emissions code meaning the differential pressure across the diesel particulate filter (DPF) on bank 1 is too low. A pressure sensor measures the difference between the DPF inlet and outlet to gauge how loaded with soot the filter is; an abnormally low reading suggests the filter isn't restricting flow as expected. This can indicate a cracked, missing, or hollowed-out DPF substrate, or a sensor/hose problem giving a false low reading. It points to the DPF or its differential pressure sensing system rather than the engine itself. On Volkswagen specifically, this code is documented across 3 models.
What causes P244A on Volkswagen vehicles?▼
Common causes on Volkswagen: Cracked, damaged, or failed (hollow) DPF substrate, Faulty DPF differential pressure sensor, Disconnected, cracked, or leaking pressure sensor hoses, Clogged or blocked pressure sensor reference lines, Exhaust leak upstream or around the DPF. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P244A on a Volkswagen?▼
Repair costs on Volkswagen range from $100 to $2,500, depending on the specific model and root cause.
Which Volkswagen models have P244A documented?▼
Au7o has documented P244A on 3 Volkswagen models: T-Roc, Touareg, Touran.