P243C fault code: what it means

P243C: SkyActiv-D: DPF is needing regenerations too often (short distance between regens). Look for why the engine is making too much soot.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

high soot from poor combustion (injectors, EGR)
exhaust gas pressure sensor No.2
DPF clogged so regen can't clear it

P243C by make

Mazda

SkyActiv-D: DPF is needing regenerations too often (short distance between regens). Look for why the engine is making too much soot.

Usual causes: high soot from poor combustion (injectors, EGR); exhaust gas pressure sensor No.2; DPF clogged so regen can't clear it

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 P243C 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.