P0563 fault code: what it means

P0563: System voltage is too high, usually an overcharging alternator. Can damage electronics and the battery.

Engine and gearbox (powertrain) · Costly if missed

Usual causes, most likely first

faulty alternator voltage regulator
poor battery earth or sense wire
faulty battery

P0563 by make

Isuzu

System voltage high.

Usual causes: alternator regulator fault; battery fault; poor battery connection

MG

System voltage high.

Usual causes: alternator regulator fault; battery sensor fault

What the repair usually costs

Parking sensor replace, one sensorNZ$130–NZ$520 · A$130–A$510
EV battery pack replace (Tesla / Kona / Ioniq / MG / BYD, genuine)NZ$22,110–NZ$47,100 · A$21,240–A$45,230

Not sure what P0563 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.