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P2002 Fault Code – Particle Filter Bank 1 Malfunction
The OBD code P2002 indicates an issue with the efficiency of the DPF (Diesel Particulate Filter), a crucial component in reducing emissions by trapping soot from diesel engines.
Affected vehicles include:
Alfa Romeo, Audi, BMW, Chevrolet, Chrysler, Citroen, Dodge, Fiat, Ford, Honda, Hyundai, Iveco, Jaguar, Kia, Lamborghini, Lancia, Land Rover, Mazda, Mercedes, Mini, Mitsubishi, Nissan, Opel, Peugeot, Porsche, Renault, Saab, Seat, Skoda, Subaru, Suzuki, Vauxhall, Volkswagen, Volvo
| Fault | Particulate Filter Efficiency Below Threshold Bank 1 |
| Meaning | Diesel Particulate Filter Efficiency Below Threshold |
| Outcome | If not fixed, can lead to reduced vehicle performance, increased emissions, and potentially costly repairs |
| Causes | – Blocked or damaged DPF – Faulty DPF sensors – Leaks in the exhaust system – Low quality or incorrect AdBlue / Diesel Exhaust Fluid (DEF) |
| Checks | – Inspect the exhaust system and DPF for signs of damage or leaks – Check AdBlue quality – Evaluate DPF sensors for proper operation and accurate readings – If possible, perform a DPF regeneration using Bi-Directional scan tool – Consult Service Bulletins (TSBs) for any known issues |
| Fixes | – Clean the DPF (lowest cost option) – Replace the DPF (most expensive option) |
If your DPF filter has moderate to severe build-up of soot, cleaning may be the best option in order to avoid a complete DPF replacement. Submit the Click & Collect form if you would like Valley Filters to professionally clean your DPF.