P2464 code meaning
Diesel Particulate Filter Differential Pressure Too Low (Bank 2)
Powertrain system Generic code P24xx codes Check engine light
What P2464 means
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.
P2464 at a glance
- Check engine lightYes, usually on
- Emissions testCan fail
- Limp modePossible
- Repair difficultyMedium, DIY possible
- Typical labor0.3 to 3 hours
- Clears after repairAfter a drive cycle
Symptoms of P2464
- MIL on
- Visible soot at the tailpipe if the filter is damaged
- Regeneration suspended or reduced power on some engines
Common causes of P2464
- Most 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
- Less likelyDifferential pressure sensor drifting low
Check the most likely causes first. Replacing parts by guesswork is the most expensive way to clear a code.
Parts involved
DPF b2DPF diff pressure sensorDPF pressure lines
What each part of P2464 means
| P | Powertrain system: engine, fuel system, ignition, emissions and transmission. |
| 2 | Generic code (second SAE range): it means the same on every make. |
| 4 | Area: auxiliary emission controls (catalytic converter, EGR, EVAP). |
| 64 | The exact fault in that area. |
What to do next
- Note P2464 and any other codes stored with it: several codes together often point to one cause.
- Check for loose connectors and damaged wiring around the parts the code names.
- Check open recalls for your car: some faults are fixed for free by the dealer. Enter your VIN.
- Clear the code only after the repair. If it comes back, the fault is still there.
Buying a used car? Scan it for stored codes before you pay. A recently cleared memory can hide a problem.
Questions about P2464
What does P2464 mean?
P2464 means "Diesel Particulate Filter Differential Pressure Too Low (Bank 2)". P2464 is stored when the pressure drop across the second particulate filter stays smaller than the controller predicts for the current exhaust flow. It is a generic code, so it means the same on every make.
Is it safe to drive with P2464?
Drive gently and only to a workshop. With P2464 the car can go into limp mode (reduced power) to protect itself.
Will P2464 fail an emissions test?
Yes, it can. P2464 is emissions-related, so most inspection programs fail a car while it is stored or while the check engine light is on.
How hard is P2464 to fix?
Difficulty: medium. A typical repair takes 0.3 to 3 hours of work. A careful DIY repair is possible with basic tools and a scanner.
Will P2464 clear itself after the repair?
After the repair the car has to complete a drive cycle (a mix of city and highway driving) before the test runs again. Until then the readiness monitor shows "not ready", which can fail an inspection.