PowertrainP1A38

Caution

Severity: Caution - get it checked when you can

Traction battery single cell voltage generally too low

9 brands affected · Description from BYD data.

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

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

Have it diagnosed promptly. If the car runs and drives normally, drive gently to a workshop. If it runs badly, stalls, overheats, loses oil pressure, or a warning light is flashing or red, stop safely and get professional help. If the code concerns the brakes, brake vacuum or brake assist, do not drive until it is checked: a hard pedal or longer stopping distance means stop.

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 9

Brand	Code	Description	System
BYD	P1A38	Traction battery single cell voltage generally too low Brand	Powertrain
Chery	P1A38	CVT speed ratio request detection fault Brand	Powertrain
EOBD	P1A38	Cellnummerfel Brand	Powertrain
Honda	P1A38	No description available	Powertrain
Land Rover	P1A38	No description available	Powertrain
Mitsubishi	P1A38	Cell number error Brand	Powertrain
Peugeot	P1A38	No description available	Powertrain
Proton	P1A38	Cell number error Brand	Powertrain
MG (SAIC)	P1A38	Cell Temperature Spread 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 P1A3xx codes.