P2464Diesel Particulate Filter Differential Pressure Too Low (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
- P2464 is stored when the pressure drop across the second particulate filter stays smaller than the controller predicts for the current exhaust flow. Only engines that run a separate filter on each bank, typically larger V diesels, can log it. No manufacturer publishes a bank 2 calibration for this number, so the bank 1 partner P244A is the reference: Ford's 2023 diesels treat it as a missing substrate test and flag a filter inlet pressure below a flow-dependent limit, roughly 8 kPa at 300 m³/h, held for 90 s. CARB requires a check of this kind so that a cracked, melted or removed filter cannot go unnoticed. In the workshop a sensing hose that has come off, split or plugged is found far more often than a broken substrate. The MIL comes on; some engines also reduce power.
- What you may notice
- MIL on
- Visible soot at the tailpipe if the filter is damaged
- Regeneration suspended or reduced power on some engines
- Likely causes
- LikelyPressure sensing hose of the bank 2 filter detached, cracked or leaking
- PossibleUpstream sensing port or line blocked with soot or condensate
- PossibleFilter substrate cracked, melted or removed
- RareDifferential pressure sensor drifting low
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Medium · Often possible to do yourself.Typical cost: €20 – €2,500
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.