P2455 fault code: what it means

P2455: DPF differential pressure sensor A circuit high.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

failed sensor
blocked hose
wiring fault

P2455 by make

GWM

GWM diesel ute: DPF pressure sensor circuit high.

Usual causes: blocked hose; sensor

Isuzu

DPF pressure sensor circuit high.

Usual causes: blocked hose; failed sensor

LDV

LDV diesel: DPF pressure sensor circuit high.

Usual causes: blocked hose; sensor

Mazda

DPF differential pressure sensor (exhaust gas pressure sensor No.2) circuit high. DPF regeneration stops and power is restricted.

Usual causes: DPF pressure sensor; open circuit or short to power; sensor hose fault

Toyota

DPF differential pressure sensor circuit high on 1GD/2GD diesels.

Usual causes: sensor wiring fault; failed DPF pressure sensor; blocked sensor hose

What the repair usually costs

CVT valve body replacement (remanufactured, in car)NZ$1,280–NZ$2,420 · A$1,200–A$2,400

Not sure what P2455 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.