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EmissionsSeverity Medium: diagnose soon

P244ADiesel Particulate Filter Differential Pressure Too Low (Bank 1)

What it means

The pressure difference across the particulate filter is lower than possible for the exhaust flow.

Symptoms

  • Check engine light
  • Regeneration may not run

Common causes

  • Split or disconnected sensor hose
  • Hoses swapped
  • Cracked or removed DPF
  • Faulty sensor

What to check first

  1. Inspect sensor hoses and their routing
  2. Compare readings at idle and 3,000 rpm
  3. Check the sensor with a hand pump if possible
Can I drive with P244A? 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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P244A: questions and answers

What does P244A mean?

P244A: Diesel Particulate Filter Differential Pressure Too Low (Bank 1). The pressure difference across the particulate filter is lower than possible for the exhaust flow.

What are the symptoms of P244A?

Check engine light. Regeneration may not run.

What causes P244A?

Split or disconnected sensor hose. Hoses swapped. Cracked or removed DPF. Faulty sensor.

How do you diagnose P244A?

1. Inspect sensor hoses and their routing 2. Compare readings at idle and 3,000 rpm 3. Check the sensor with a hand pump if possible

Can I drive with P244A?

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