OBD-II code · Powertrain (generic, extended)
P243D Particulate Filter Regeneration Duration Bank 2
Regenerations on bank 2 take longer than calibrated to complete - typically a low EGT during the cycle (cold weather, short trips) or a partially aged catalyst before the DPF.
Is it safe to drive with P243D?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyRegeneration too slow
Symptoms
- Check engine light or DPF warning light on
- Power loss / limp mode
- Increased fuel consumption
- Failed forced regeneration attempts
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Likely to fail
- Parts involved
- Dpf B2
Related codes
- P243AParticulate Filter Restriction Ash Accumulation Bank 2
- P243BParticulate Filter Restriction Forced Limited Power Bank 2
- P243CParticulate Filter Regeneration Frequency Bank 2
- P243EParticulate Filter Regeneration Incomplete Bank 2
- P243FParticulate Filter Restriction Soot Accumulation Too High Bank 2
- P2440Secondary Air Injection System Switching Valve Stuck Open (Bank 1)
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.