P24FDParticulate Filter A Incorrect
- 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
- P24FD is intended to flag that the particulate filter in position A is not the expected part or is absent, for example after a filter delete or when an unsuitable replacement has been fitted. No manufacturer documents P24FD publicly. CARB's rules for light and heavy-duty diesels require the OBD system to notice a substrate that is destroyed, removed or swapped for a silencer or plain pipe. Makers usually report that through other codes: Ford's 2023 diesel summary catches a missing substrate as P244A when DPF inlet pressure stays under a flow-dependent limit (about 15 kPa at 600 m³/h) for 90 seconds, and P226D exists for a deteriorated or missing substrate. Expect a lit MIL and a failed emissions inspection until the correct filter is installed.
- What you may notice
- Check engine light
- Visible soot at the tailpipe if the filter is missing
- Emissions inspection failed
- Likely causes
- LikelyParticulate filter removed or replaced by a straight pipe
- PossibleNon-approved or wrong-specification filter fitted
- RareLeaking or blocked pressure lines making a present filter look absent
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Hard · Usually a job for a workshop.Typical cost: €400 – €3,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.