Mazda
Battery deterioration detected (i-stop battery management). i-stop stops working. Usually the battery is worn; Mazda i-stop needs the right EFB/AGM battery.
P057F fault code: what it means
P057F: Battery deterioration detected (i-stop battery management). i-stop stops working. Usually the battery is worn; Mazda i-stop needs the right EFB/AGM battery.
Usual causes, most likely first
- worn or wrong-type battery
- battery current sensor
- battery terminals loose or corroded
- body control module (rare)
P057F by make
What the repair usually costs
- 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 (Kona / Ioniq / MG / older Tesla, AGM)NZ$330–NZ$710 · A$320–A$680
Not sure what P057F 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.