vinkodex.
Engine code

A20DTH engine faults.

Listed as: 2.0 CDTI (ecoFLEX), 2.0 CDTI. The faults belong to this engine code. They do not apply to every car with that name.

diesel

fuel

1956 cc

displacement

96–125 kW (131–170 HP)

power

1 fault write-ups. Important.

Before you buy

Known faults

1 important faults

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

expensive

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.

Show the rest

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.

between 120,000 and 220,000 km

What to check

  • Ask for a full fault code read: DPF differential pressure, EGR, injector correction
  • Try it on the open road: is there limp mode, loss of power, a DPF light
  • Ask whether there was a forced regeneration, an EGR clean or a DPF replacement: ask for the invoice
2 more steps in the write-up

Engine code

Factory data

Factory data

Engine family
—
Fuel
diesel
Displacement
1956 cc
Power
96–125 kW (131–170 HP)
Production
—

Generations

Which models it is fitted to

4 generations.

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