P243EParticulate Filter Regeneration Incomplete (Bank 2)
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Needs a drive cycle to confirm a fix
- How the car detects it
- P243E is set when the second filter strand has finished regenerating but the soot was not burned off as planned. CARB requires a malfunction to be flagged whenever the filter does not regenerate properly under the manufacturer's intended conditions. Public manufacturer material covers only bank 1 here: for P24A2, Ford's 2023 diesels evaluate each regeneration, allow up to 40 minutes and store a fault if the soot estimate at the end is still above a threshold. Regenerations cut short by brief trips or switching off are the usual reason, followed by too little heat on that bank, a faulty temperature or pressure sensor or a fuel dosing problem. Ignored, the filter keeps loading until P243F or a power limit follows.
- What you may notice
- MIL on, filter warning
- Regeneration restarts soon after the last one
- Rising soot load in live data
- Likely causes
- LikelyRegenerations interrupted by short trips or engine shut-off
- PossibleToo little heat on bank 2 (catalyst, post-injection or dosing fault)
- PossibleFaulty temperature or differential pressure signal
- 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: €0 – €1,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.