NetworkU049C

Serious

Severity: Serious - have it checked soon

Invalid Data Received From Battery Charger Control Module A

12 brands affected · Generic SAE J2012 description.

Key terms: Control module: a small computer that runs one part of the car · SAE J2012: the standard generic code list

1What it means in plain English

Control modules in the car cannot communicate with each other over the vehicle network.

2Common causes

Wiring or connector fault on the communication bus
Faulty control module
Low battery voltage or poor ground
Water ingress in a connector or module
Aftermarket device interfering with the bus

3Can I drive?

Serious · drive with care

The car may run normally or may not run at all. If the module that has lost communication controls steering, brakes, park brake, charging or engine cooling, drive only if those systems feel normal; stop safely if the steering becomes heavy, a brake warning appears, or the engine temperature climbs. If the car will not start or runs badly, have it towed.

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 12

Brand	Code	Description	System
Ashok Leyland CV	U049C	Intermediate Shaft Speed Sensor A Circuit No Signal Brand	Network
Mercedes-Benz	U049C	Invalid Data Received From Battery Charger Control Module A SAE	Network
Daewoo	U049C	Invalid Data Received From Battery Charger Control Module A SAE	Network
EOBD	U049C	Kehtetu andme saamine laadija juhtmoodulilt 'A' Brand	Network
GM	U049C	Invalid Data Received From Battery Charger Control Module A SAE	Network
Holden	U049C	Invalid Data Received From Battery Charger Control Module A SAE	Network
Land Rover	U049C	Invalid Data Received From Battery Charger Control Module Brand	Network
Opel	U049C	Invalid Data Received From Battery Charger Control Module A SAE	Network
Peugeot	U049C	Invalid Data Received From Battery Charger Control Module A SAE	Network
Saab	U049C	Invalid Data Received From Battery Charger Control Module A SAE	Network
Subaru	U049C	Invalid Data Received From Battery Charger Control Module A SAE	Network
Toyota	U049C	Invalid data received from battery charger control module 'A' Brand	Network

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 14

These 7-character codes are manufacturer-specific variants of U049C and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	U049C00	Implausible data were received from the on-board charger. Brand	Network
Mercedes-Benz	U049C08	Implausible data were received from the on-board charger. There is a signal fault or the message is faulty. Brand	Network
Mercedes-Benz	U049C26	Implausible data were received from the on-board charger. The signal change rate is below the permissible limit value. Brand	Network
Mercedes-Benz	U049C29	Implausible data were received from the on-board charger. There is an invalid signal. Brand	Network
Mercedes-Benz	U049C33	Implausible data were received from the on-board charger. The off-time of the signal frequency is too long. Brand	Network
SsangYong	U049CF0	Battery sensor: Current measured fault Brand	Network
SsangYong	U049CF1	Battery sensor: Self diagnosis fault Brand	Network
SsangYong	U049CF2	Battery sensor: battery capacity abnormal (above 120 Ah) Brand	Network
SsangYong	U049CF3	Battery sensor disconnection voltage error Brand	Network
SsangYong	U049CF4	Battery sensor: charge status abnormal (above 100%) Brand	Network
SsangYong	U049CF5	Battery sensor: State of function fault Brand	Network
SsangYong	U049CF6	Battery sensor: battery condition abnormal (above 100%) Brand	Network
SsangYong	U049CF7	Battery sensor: battery temperature abnormal Brand	Network
SsangYong	U049CF8	Battery sensor: battery voltage measurement error Brand	Network

6Related codes

Browse Uxxx codes or U049xx codes.