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EmissionsSeverity Medium: diagnose soon

P244BDiesel Particulate Filter Differential Pressure Too High (Bank 1)

What it means

The pressure difference across the particulate filter is higher than allowed: the filter is restricted.

Symptoms

  • Loss of power or limp mode
  • Radiator fan running after switch-off (regeneration)
  • Higher fuel consumption
  • DPF warning light

Common causes

  • Blocked DPF (soot or ash)
  • Blocked sensor hose giving a false reading
  • Faulty sensor

What to check first

  1. Check differential pressure at idle and 3,000 rpm
  2. Check the sensor hoses for blockage
  3. Find and fix the cause of excess soot before cleaning
Can I drive with P244B? Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.

Generic OBD-II meaning. Manufacturer-specific meanings and checks can differ; always check the service information for the car.

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P244B: questions and answers

What does P244B mean?

P244B: Diesel Particulate Filter Differential Pressure Too High (Bank 1). The pressure difference across the particulate filter is higher than allowed: the filter is restricted.

What are the symptoms of P244B?

Loss of power or limp mode. Radiator fan running after switch-off (regeneration). Higher fuel consumption. DPF warning light.

What causes P244B?

Blocked DPF (soot or ash). Blocked sensor hose giving a false reading. Faulty sensor.

How do you diagnose P244B?

1. Check differential pressure at idle and 3,000 rpm 2. Check the sensor hoses for blockage 3. Find and fix the cause of excess soot before cleaning

Can I drive with P244B?

Usually yes for a short distance, but performance or economy may suffer and the fault can get worse. Diagnose it soon.