PowertrainP0A9B

Caution

Severity: Caution - get it checked when you can

Temperature sensor fault (severe)

24 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

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 24

Brand	Code	Description	System
Ashok Leyland CV	P0A9B	No description available	Powertrain
BAIC Motor	P0A9B	Hybrid Battery Temperature Sensor A Circuit Brand	Powertrain
Mercedes-Benz	P0A9B	No description available	Powertrain
BYD	P0A9B	Hybrid Battery Temperature Sensor A Circuit Brand	Powertrain
Chery	P0A9B	Hybrid Battery Temperature Sensor A Circuit Brand	Powertrain
Daewoo	P0A9B	Hybrid Battery Temperature Sensor A Circuit Brand	Powertrain
DFFS	P0A9B	Temperature sensor fault Brand	Powertrain
DFFX	P0A9B	Hybrid Battery Temperature Sensor A Circuit Brand	Powertrain
DFXK	P0A9B	Hybrid Battery Temperature Sensor A Circuit Brand	Powertrain
EOBD	P0A9B	Litar penderia suhu bateri Hibrid/EV 'A' Brand	Powertrain
Geely	P0A9B	Hybrid Battery Temperature Sensor A Circuit Brand	Powertrain
GM	P0A9B	Hybrid Battery Temperature Sensor A Circuit Brand	Powertrain
Great Wall	P0A9B	Hybrid Battery Temperature Sensor A Circuit Brand	Powertrain
Hafei	P0A9B	Hybrid Battery Temperature Sensor A Circuit Brand	Powertrain
Honda	P0A9B	HV Battery Temperature Sensor 1 Circuit Brand	Powertrain
Hyundai	P0A9B	No description available	Powertrain
Isuzu	P0A9B	No description available	Powertrain
Land Rover	P0A9B	No description available	Powertrain
Peugeot	P0A9B	No description available	Powertrain
Proton	P0A9B	No description available	Powertrain
Saab	P0A9B	Hybrid Battery Temperature Sensor A Circuit Brand	Powertrain
MG (SAIC)	P0A9B	Hybrid Battery Temperature Sensor A Circuit Brand	Powertrain
Suzuki	P0A9B	Hybrid Battery Cell Temperature Sensor Error Brand	Powertrain
Toyota	P0A9B	Temperature sensor fault (severe) 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.

5Extended variant codes 6

These 7-character codes are manufacturer-specific variants of P0A9B and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	P0A9B00	The temperature sensor A of the high-voltage battery has an electrical fault. Brand	Powertrain
Mercedes-Benz	P0A9B01	Temperature sensor A of the hybrid/high-voltage battery has an electrical fault. General Electrical Failure. Brand	Powertrain
Mercedes-Benz	P0A9B02	Temperature sensor A of the hybrid/high-voltage battery has an electrical fault. General Signal Failure. Brand	Powertrain
Mercedes-Benz	P0A9B09	Temperature sensor A of the hybrid/high-voltage battery has an electrical fault. Component Failure. Brand	Powertrain
Mercedes-Benz	P0A9B13	Temperature sensor A of the hybrid/high-voltage battery has an electrical fault. There is an open circuit. Brand	Powertrain
Mercedes-Benz	P0A9B64	Temperature sensor A of the hybrid/high-voltage battery has an electrical fault. There is an implausible signal. Brand	Powertrain

6Related codes

Browse Pxxx codes or P0A9xx codes.