P24A3Particulate Filter Restriction - Soot Accumulation (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- P24A3 is the bank 2 entry for a particulate filter whose soot load, estimated from differential pressure, exhaust flow and a soot model, has climbed to the point where it noticeably restricts flow and needs a regeneration. It only appears on engines with two separate filter strands, such as some V engines. Public manufacturer documentation for this exact code is missing (the NHTSA bulletin index has no hit either), so this text leans on CARB's filter-clogging requirement and on the bank 1 equivalent P2463, which Deutz lists as a high soot load warning. The stronger level for bank 2, beyond which a normal regeneration may no longer be safe, is P243F, while ash build-up is reported separately. A long motorway drive or a workshop-initiated regeneration often clears it; repeated returns point to the cause behind the soot.
- What you may notice
- Particulate filter or engine warning lamp
- Reduced power or slow response
- Higher fuel consumption
- Likely causes
- LikelyMostly short trips so passive and active regeneration cannot finish
- PossibleExcess soot from injectors, EGR or boost problems
- PossibleDifferential pressure sensor or hoses on bank 2 giving a false high reading
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Usually a job for a workshop.Typical cost: €50 – €800
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.