Powertrain, generic (extended)

P2464 Diesel Particulate Filter Differential Pressure Too Low (Bank 2)

Check engine lightOn

EmissionsRelevant

Drive cycleRequired

Limp modePossible

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.

Likely causes

Pressure sensing hose of the bank 2 filter detached, cracked or leaking

Upstream sensing port or line blocked with soot or condensate

Filter substrate cracked, melted or removed

Differential pressure sensor drifting low

Symptoms

MIL on
Visible soot at the tailpipe if the filter is damaged
Regeneration suspended or reduced power on some engines

Repair estimate

DifficultyMediumDIY possible

Parts and labour€20–2,500

Time0.3–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

dpf b2dpf diff pressure sensordpf pressure lines

Related codes

P2465 P244A P2452 P2453 P243F

References: law.cornell.edu, fordservicecontent.com.