P02CB fault code: what it means

P02CB: SkyActiv-D 2.2: large turbo underboost (two-stage turbo). Blocked air filter and boost leaks are common, then wastegate control.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

blocked air filter or misplaced bonnet insulator
boost leak in intake
wastegate vacuum piping or solenoid valve
exhaust leak

P02CB by make

Mazda

SkyActiv-D 2.2: large turbo underboost (two-stage turbo). Blocked air filter and boost leaks are common, then wastegate control.

Usual causes: blocked air filter or misplaced bonnet insulator; boost leak in intake; wastegate vacuum piping or solenoid valve; exhaust leak

What the repair usually costs

Turbocharger replacement (petrol)NZ$1,710–NZ$4,560 · A$1,560–A$4,240
Intercooler or boost hose replacementNZ$250–NZ$1,780 · A$250–A$1,710
Full / logbook service (car)NZ$310–NZ$590 · A$310–A$580
Engine air filter replacementNZ$40–NZ$130 · A$30–A$120

Not sure what P02CB 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.