P24A2Particulate Filter Regeneration Incomplete (Bank 1)
- 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
- P24A2 judges the outcome of a regeneration on the bank 1 filter: the event ended, but the estimated soot left in the filter is still above the allowed level. Ford's 2023 diesel summary runs this once per regeneration for up to 40 minutes and compares the soot estimate at the end with a threshold. Deutz uses P24A2-00 for a regeneration stopped because the temperature got too high, and Hino bulletin SB-22-007 lists it together with P24A1 for a fuel filter issue on 2020 trucks. CARB demands detection of a filter that does not regenerate properly. Too low or too high exhaust temperatures, aborted regenerations and pressure sensor errors are common reasons. P243E is the bank 2 version; P24A4 follows if soot keeps rising.
- What you may notice
- Malfunction indicator lamp or filter warning on
- More frequent regenerations, higher fuel consumption
- Reduced power if soot keeps building
- Likely causes
- LikelyRegenerations interrupted by short trips or engine shut-off
- PossibleExhaust temperature not reaching target (doser, oxidation catalyst, sensors)
- PossibleDifferential pressure sensor or its hoses giving a wrong soot estimate
- RareRegeneration stopped by over-temperature protection
- 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: €80 – €1,200
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.