PowertrainP1A5A

Caution

Severity: Caution - get it checked when you can

Hybrid/EV battery pack temperature

15 brands affected · Description from Toyota data.

Key terms: Control module: a small computer that runs one part of the car · Powertrain: engine, transmission and emissions

Safety: This code relates to the battery temperature. A hot or poorly cooled battery can lose power, and a damaged battery carries a fire risk.

1What it means in plain English

The engine or powertrain control system has stored a fault that does not have specific guidance in this database yet.

2Common causes

Sensor or actuator fault
Wiring or connector fault
Vacuum or intake leak
Fuel or ignition problem
Control module fault

3Can I drive?

Caution · drive with care

Watch for a battery temperature warning. If the warning is on, stop safely and let the battery cool; do not charge a hot battery and have it checked.

This page gives general information. It is not professional advice. For a definite diagnosis and a repair quote, ask a qualified mechanic to inspect the car.

4Brand data 15

Brand	Code	Description	System
BYD	P1A5A	BMS discharging hardware protection Brand	Powertrain
Chery	P1A5A	Battery voltage too high Brand	Powertrain
Daewoo	P1A5A	No description available	Powertrain
EOBD	P1A5A	CMU09 cell voltage low Brand	Powertrain
GM	P1A5A	No description available	Powertrain
Holden	P1A5A	Hybrid/EV Battery Pack Temperature Brand	Powertrain
Honda	P1A5A	No description available	Powertrain
Land Rover	P1A5A	No description available	Powertrain
Mitsubishi	P1A5A	CMU09 Cell voltage low Brand	Powertrain
Opel	P1A5A	No description available	Powertrain
Peugeot	P1A5A	No description available	Powertrain
Proton	P1A5A	CMU09 Cell voltage low Brand	Powertrain
Saab	P1A5A	No description available	Powertrain
MG (SAIC)	P1A5A	Brake Position Sensor General Faults Brand	Powertrain
Toyota	P1A5A	Hybrid/EV battery pack temperature Brand	Powertrain

Legend: SAE is the generic J2012 description; Brand is text taken from that manufacturer’s data. Manufacturer rows keep the wording and language of the source data, and non-English text is tagged so screen readers pronounce it correctly.

5Related codes

Browse Pxxx codes or P1A5xx codes.