P0078 fault code: what it means

P0078: Exhaust valve timing control solenoid circuit open or shorted. Exhaust VTC is held in its default position; slight loss of power and economy.

Engine and gearbox (powertrain) · Minor

Usual causes, most likely first

exhaust valve timing control solenoid valve
wiring or connector fault

P0078 by make

Nissan

Exhaust valve timing control solenoid circuit open or shorted. Exhaust VTC is held in its default position; slight loss of power and economy.

Usual causes: exhaust valve timing control solenoid valve; wiring or connector fault

What the repair usually costs

Turbocharger replacement (diesel ute / SUV)NZ$1,920–NZ$5,130 · A$1,780–A$4,810

Not sure what P0078 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.