Toyota
Hybrid battery voltage sensor all circuits low: the battery ECU sees low voltage on every sense line, pointing to a supply, connector or ECU fault.
P308A fault code: what it means
P308A: Hybrid battery voltage sensor all circuits low: the battery ECU sees low voltage on every sense line, pointing to a supply, connector or ECU fault.
Usual causes, most likely first
- battery ECU (sensor module) power or earth fault
- sense harness connector off or corroded
- failed battery ECU
P308A by make
What the repair usually costs
- Alternator replace (small / medium car, petrol)NZ$510–NZ$1,020 · A$480–A$1,000
- Alternator replace (SUV / ute / diesel)NZ$750–NZ$1,560 · A$710–A$1,490
- Alternator replace (European, smart charging)NZ$930–NZ$2,130 · A$850–A$1,990
- Hybrid battery reconditioned exchange (Aqua / Prius C / Axio / Fielder)NZ$1,360–NZ$2,430 · A$1,390–A$2,370
Not sure what P308A 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.