OBD-II code · Powertrain (generic, extended)
P243C Particulate Filter Regeneration Frequency Bank 2
The DPF on bank 2 needs regeneration more often than calibrated. Possible causes are an oil-burning engine, fuel-injector leak, short-trip operation, or a sensor offset.
Is it safe to drive with P243C?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyShort-trip operation
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, Fuel Injectors
Related codes
- P2439AIR System Air Flow or Pressure Sensor Circuit Intermittent or Erratic Bank 2
- P243AParticulate Filter Restriction Ash Accumulation Bank 2
- P243BParticulate Filter Restriction Forced Limited Power Bank 2
- P243DParticulate Filter Regeneration Duration Bank 2
- P243EParticulate Filter Regeneration Incomplete Bank 2
- P243FParticulate Filter Restriction Soot Accumulation Too High Bank 2
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.