PowertrainP1A56

Caution

Severity: Caution - get it checked when you can

Hybrid/EV System Voltage Discharge Circuit

13 brands affected · Description from GM 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 charging system. The battery may go flat and the car may stall.

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

The electrical system may fail and the battery may go flat, risking a stall. If the battery or charging warning light is on, drive straight to a workshop.

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 13

Brand	Code	Description	System
BYD	P1A56	Battery pack capacity too low Brand	Powertrain
Daewoo	P1A56	Hybrid/EV System Voltage Discharge Circuit Brand	Powertrain
EOBD	P1A56	CMU05 cell voltage low Brand	Powertrain
GM	P1A56	Hybrid/EV System Voltage Discharge Circuit Brand	Powertrain
Holden	P1A56	Control Module Hardware Malfunction Brand	Powertrain
Honda	P1A56	No description available	Powertrain
Land Rover	P1A56	No description available	Powertrain
Mitsubishi	P1A56	CMU05 Cell voltage low Brand	Powertrain
Opel	P1A56	Hybrid/EV System Voltage Discharge Circuit Brand	Powertrain
Peugeot	P1A56	Hybrid/EV System Voltage Discharge Circuit Brand	Powertrain
Proton	P1A56	CMU05 Cell voltage low Brand	Powertrain
Saab	P1A56	Hybrid/EV system voltage discharge circuit Brand	Powertrain
MG (SAIC)	P1A56	Safety Reaction Manager General Fault 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.