P253F fault code: what it means

P253F: SkyActiv-D: engine oil deteriorated (PCM oil-life model says oil is worn or diluted). Change oil with the right grade and reset the oil data.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

oil overdue or diluted by DPF regens
oil data not reset at last oil change
oil pressure or oil temperature sensor

P253F by make

Mazda

SkyActiv-D: engine oil deteriorated (PCM oil-life model says oil is worn or diluted). Change oil with the right grade and reset the oil data.

Usual causes: oil overdue or diluted by DPF regens; oil data not reset at last oil change; oil pressure or oil temperature sensor

What the repair usually costs

Basic service: engine oil and filter change (car)NZ$120–NZ$260 · A$120–A$260
Basic service: engine oil and filter change (SUV / diesel ute / 4WD)NZ$190–NZ$370 · A$180–A$360
Basic service: engine oil and filter change (European)NZ$220–NZ$420 · A$210–A$400

Not sure what P253F 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.