P0C78 fault code: what it means

P0C78: PHEV: drive motor inverter capacitor did not pre-charge correctly at start-up. Car will not go to READY.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

blown main high-voltage fuse
high-voltage harness or connector fault
drive battery or PHEV ECU fault
weak 12V battery as the first trigger

P0C78 by make

Mitsubishi

PHEV: drive motor inverter capacitor did not pre-charge correctly at start-up. Car will not go to READY.

Usual causes: blown main high-voltage fuse; high-voltage harness or connector fault; drive battery or PHEV ECU fault; weak 12V battery as the first trigger

What the repair usually costs

Hybrid 12 V auxiliary battery (Aqua / Prius C / Axio, S34B20R)NZ$330–NZ$510 · A$310–A$500
Hybrid 12 V auxiliary battery (Prius 30 / Prius alpha / CT200h, S46B24R AGM)NZ$390–NZ$690 · A$360–A$590
Hybrid 12 V auxiliary battery (Camry / RAV4 / C-HR / Lexus, S55D23R or LN1-LN2 AGM)NZ$420–NZ$770 · A$390–A$730
EV 12 V battery replace (Nissan Leaf / e-NV200, lead-acid)NZ$200–NZ$340 · A$210–A$380

Not sure what P0C78 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.