P1794 fault code: what it means

P1794: i-ELOOP capacitor malfunction. i-stop and i-ELOOP charging are disabled.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

capacitor deteriorated
blown capacitor fuse or wiring
DC-DC converter fault
alternator overcharging

P1794 by make

Mazda

i-ELOOP capacitor malfunction. i-stop and i-ELOOP charging are disabled.

Usual causes: capacitor deteriorated; blown capacitor fuse or wiring; DC-DC converter fault; alternator overcharging

What the repair usually costs

EV on-board charger / ICCU / charging module replace (Hyundai / Kia / MG / Tesla)NZ$3,150–NZ$7,880 · A$3,060–A$7,650

Not sure what P1794 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.