P2002 and P2003: particulate filter efficiency
The engine computer judges that the diesel particulate filter is no longer trapping soot as it should. P2002 is bank 1, P2003 bank 2.
SeverityModerateUsually not urgent today, but it can get worse if left.
Can you keep driving?Drive gently, check it soonWhat does P2002 mean?
The particulate filter traps soot and burns it off from time to time. The computer watches the pressure difference across the filter: a filter that works builds up a predictable difference. When the difference is too small for the conditions, the filter is treated as cracked, removed or bypassed, which is what this code reports. It is the opposite of a blocked filter.
What causes P2002?
- A cracked or melted filter, often after a regeneration that went wrong
- A faulty differential pressure sensor
- Split, blocked or swapped pressure sensor pipes
- An exhaust leak ahead of the filter
What to check first for P2002
- Inspect the pressure sensor pipes for splits, blockage or connections swapped over
- Have the pressure difference read at idle and at higher engine speed
- Look for soot at the tailpipe, the sign of a filter that is letting it through
- Check for exhaust leaks ahead of the filter
Can you drive with P2002?
The car usually runs normally and can be driven to a workshop. Have it seen soon: emissions are higher, the car will fail an emissions test, and some engines limit power until the fault is cleared.
In states with an OBD-II emissions inspection, a car with the check engine light on fails the test until the fault is fixed.
Codes on this page
- P2002Particulate Trap Efficiency Below ThresholdBank 1
- P2003Particulate Trap Efficiency Below ThresholdBank 2
Related codes
Checked on · Rafael Soares
These are the generic meanings every manufacturer shares. Each brand adds its own detail, so your car's handbook, its service information and a qualified mechanic have the last word. OdoKeep has no connection with any manufacturer, and the app does not read codes from the car.
