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.
- Check engine light: Yes
- Emissions related: Yes
- Repair difficulty: medium
Symptoms
- Check engine light or DPF warning light on
- Power loss / limp mode
- Increased fuel consumption
- Failed forced regeneration attempts
Common causes
Ordered by how often each turns out to be the cause.
- Regeneration too slowCommon
Parts involved
- DPF B2
P243D is a generic OBD-II code defined by SAE J2012. Exact wording and diagnostic procedure vary by manufacturer and model. Code definitions are drawn from the public-domain OBDex dataset; the workshop notes are our own.