P1602 fault code: what it means

P1602: Battery supply voltage was too low. Usually a flat or disconnected battery; clear and recheck.

Engine and gearbox (powertrain) · Keep an eye on

Usual causes, most likely first

1. weak or flat battery
2. battery recently disconnected
3. alternator fault

P1602 by make

What the repair usually costs

• Hybrid 12 V auxiliary battery (Aqua / Prius C / Axio, S34B20R)NZ$330–NZ$510 · A$310–A$500

Not sure what P1602 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.