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Known fault

2.0 CDTI (A20DT* / B20DTH): DPF and EGR coking

Typically between 120,000 and 220,000 km. It does not show up on every car.

expensive

severity

between 120,000 and 220,000 km

mileage

2

sources

2 sources next to the write-up.

The fault

How you spot it

The Insignia and Astra 2.0 litre CDTI (A20DTC/DTL/DTJ/DTH/DTE/DTR, later B20DTH) is a diesel. If it warms up regularly, the particulate filter regenerates. The three common faults are: DPF blocking on short trips (no regeneration), EGR coking (loss of power, rough idle, occasionally limp mode), and at high mileage injector imbalance.

The timing belt interval is 120,000 to 150,000 km or 6 to 10 years.

If the car only ran in town, the particulate filter can block because it does not regenerate, and the EGR cokes up.

Which model

Who it affects

The card opens the generation, the engine or the transmission.

Engines and transmissions

Checklist

2.0 CDTI (A20DT* / B20DTH): DPF and EGR coking

What you would check for this fault. Take it to the car.

Before you buy

Checklist

What you tick stays on this device only.

vinkodex.com · Before you buy it, see what can go wrong.

Sources

How we know

Information, not an expert opinion

We write the descriptions, and we put the source next to them. A person reviews them before they go out. They are still information, not a technical expert opinion.

  • A fault on the list does not mean the car you are looking at has it.
  • A fault missing from the list does not mean the model is fault-free. Write-ups are made model by model. Not all of them are done.
  • You decide whether to buy. This is no substitute for an inspection. That needs a workshop and a history check.
Details in the terms