OBD2 fault code
HighP2002
Diesel Particulate Filter Efficiency Below Threshold Bank 1
The code identifies an implausible condition in the monitored system. The component named in the code is not automatically the defective part.
What does P2002 mean?
Diesel Particulate Filter Efficiency Below Threshold Bank 1. The engine or vehicle control system detected that a measured value, control response, or communication signal was outside the expected range.
Common symptoms
- power loss or limp mode
- increased consumption and frequent regeneration
- DPF or check engine warning
Likely causes
- particulate filter loaded or regeneration incomplete
- differential pressure sensor or hoses faulty
- exhaust temperature, EGR, or combustion issue
Sensible diagnostic order
- check differential pressure at idle and under load
- inspect sensor wiring and hoses
- review regeneration status and exhaust temperatures
Can I continue driving?
Only if the vehicle runs normally; avoid heavy load. If the check-engine light flashes, the engine shakes strongly, warning messages increase, or power drops significantly, stop and arrange professional assistance.
This information is a diagnostic aid and does not replace inspection by a qualified workshop. Manufacturer-specific definitions may differ.
FAQ
Can I continue driving with P2002?
Only if the vehicle runs normally; avoid heavy load.
Does P2002 always identify a defective part?
No. A fault code identifies a monitored system or implausible condition. Wiring, voltage, leaks, and related components must also be checked.
How can DiagnostiX help with P2002?
DiagnostiX reads the code from the vehicle, assigns it to the vehicle profile, and displays relevant live values and a structured explanation.