P2458 fault code: what it means

P2458: DPF regeneration taking too long: the filter burn-off is not finishing in the expected time.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

short trips interrupting regens
heavily loaded DPF
exhaust temperature sensor fault

P2458 by make

Ford

DPF regeneration taking too long: the filter burn-off is not finishing in the expected time.

Usual causes: short trips interrupting regens; heavily loaded DPF; exhaust temperature sensor fault

Isuzu

DPD regeneration took too long or did not finish.

Usual causes: regeneration interrupted by short trips; EGT sensor fault; other engine fault blocking regeneration

LDV

DPF regeneration took too long or did not finish.

Usual causes: regeneration interrupted by short trips; EGT sensor fault; other engine fault blocking regeneration

Mazda

Mazda meaning: DPF soot load at the MID warning level (not the generic regen-duration code). Usually short-trip driving; a long run or forced regen often clears it.

Usual causes: short trips stopping DPF regeneration; pressure sensor pipe to DPF blocked or damaged; DPF restricted or damaged

Mitsubishi

DPF regeneration taking too long to finish.

Usual causes: drive cycle too short for regen to complete; exhaust temperature sensor fault; injector or EGR fault keeping soot high

What the repair usually costs

CVT valve body replacement (remanufactured, in car)NZ$1,280–NZ$2,420 · A$1,200–A$2,400
Parking sensor replace, one sensorNZ$130–NZ$520 · A$130–A$510
EGR valve replacement or cleanNZ$350–NZ$1,710 · A$330–A$1,630
DPF off-car clean (sent out)NZ$740–NZ$1,890 · A$740–A$1,820

Not sure what P2458 means on your car? Ask Credov.

Before you clear it

Write the code down or photograph the scanner first. A code that comes straight back after clearing points to a fault that is still there. A car whose codes were cleared just before you arrived may be hiding one: the scanner's readiness monitors show "not ready" for a while after codes are cleared.

Researched by Credov from manufacturer and workshop sources. A fault code points to where a fault may be; a workshop confirms it with a diagnosis. Browse all fault codes.