Fault code

P2002 fault code.

This code comes up with one known fault.

Generic code

Code type

Engine and drivetrain

System

Particulate filter efficiency is below the threshold

The particulate filter traps soot in the exhaust. The engine control unit calculates efficiency from the values before and after the filter, and it fell below the threshold. A saturated or damaged filter and abnormal combustion both lead here.

The code tells you what the control unit measured, not which part has failed. The same code has several possible causes.

Which known faults it comes up with

EA189 TDI: EGR valve and particulate filter blocking

expensive

The EGR valve and its cooler block up with soot and oily deposits; the particulate filter cannot regenerate on short urban trips. The signs are reduced power, a warning light, and frequent regeneration. The software update after the diesel emissions affair made the EGR operate more often, which accelerated the phenomenon: the maker gave goodwill repairs in several cases.

between 140,000 and 160,000 km

What to check

Ask what kind of journeys the car did: a daily short urban run is the worst for the filter
With a code reader look at the stored faults (P0401/P0402, and P2002 for the filter)
Ask whether it received the post emissions affair software update, and when

1 more steps in the write-up

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