NetworkU0140

Serious

Severity: Serious - have it checked soon

Lost Communication With Body Control Module

42 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 42

Brand	Code	Description	System
Ashok Leyland CV	U0140	Air Mass Flow Sensor. Low / Insufficient Flow Brand	Network
BAIC Motor	U0140	No BCM signal received Brand	Network
Mercedes-Benz	U0140	Lost Communication With Body Control Module SAE	Network
BYD	U0140	BCM disconnection fault Brand	Network
Chery	U0140	CAN-BCM Signal Timeout Brand	Network
Chrysler	U0140	Lost Communication With Body Control Module Brand	Network
Daewoo	U0140	Replace Electronic Control Unit Brand	Network
Daihatsu	U0140	VCU communication blackout Brand	Network
DFFS	U0140	BCM CAN timeout Brand	Network
DFFX	U0140	ECM lost communication with BCM Brand	Network
DFXK	U0140	Communication between ECM and BCM lost Brand	Network
EOBD	U0140	Kaotatud side kere juhtmooduliga Brand	Network
Fiat	U0140	Lost communication with body control module Brand	Network
Ford	U0140	Lost Communication With Body Control Module SAE	Network
Geely	U0140	BCM message timeout Brand	Network
GM	U0140	Lost Communication With Body Control Module Brand	Network
Great Wall	U0140	BCM communication timeout fault Brand	Network
Hafei	U0140	Lost Communication With Body Control Module Brand	Network
Holden	U0140	Lost Communication with Body Control Module Brand	Network
Honda	U0140	Lost Communication With Body Control Module SAE	Network
Hyundai	U0140	Lost Communication With Body Control Module SAE	Network
Isuzu	U0140	Lost Communication With Body Control Module SAE	Network
Land Rover	U0140	Lost Communication With Body Control Module SAE	Network
Maserati	U0140	Lost Communication With Body Control Module Missing Message Brand	Network
Mazda	U0140	Lost Communication With Body Control Module SAE	Network
Mitsubishi	U0140	ETACS CAN timeout Brand	Network
Nissan	U0140	Lost Communication With Body Control Module SAE	Network
Opel	U0140	Lost Communication With Body Control Module Brand	Network
Perodua	U0140	VCU communication blackout Brand	Network
Peugeot	U0140	Lost Communication With Body Control Module SAE	Network
Porsche	U0140	Timeout Bugsteuergerät Brand	Network
Proton	U0140	ETACS CAN timeout Brand	Network
Saab	U0140	Lost Communication With Body Control Module Brand	Network
Maxus (SAIC)	U0140	Lost communication with BCM Brand	Network
MG (SAIC)	U0140	CAN MS Timeout Brand	Network
Smart	U0140	Lost Communication With Body Control Module SAE	Network
Subaru	U0140	Lost Communication With Body Control Module SAE	Network
Suzuki	U0140	Lost Communication With Body Control Module – Missing Message Brand	Network
SWM Motor	U0140	ECM and body control module communication lost Brand	Network
Tata	U0140	Lost Communication With Body Control Module Brand	Network
Toyota	U0140	Lost communicationwith BCM Brand	Network
Volkswagen	U0140	SAE: No Communications with Body Control Module 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 8

These 7-character codes are manufacturer-specific variants of U0140 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	U014000	Update bits of BC signals Brand	Network
SsangYong	U014000	CAN: Lost Communication With Body Control Module Brand	Network
Mercedes-Benz	U014008	Communication with the signal acquisition and actuation module has a malfunction. There is a signal fault or the message is faulty. Brand	Network
Tata	U014008	IVN DTC Masking For DTC Number Brand	Network
Mercedes-Benz	U014087	Communication with the BCM ECU has a malfunction - missing message Brand	Network
Chery	U014087	Communication fault between ECU and A/C control module ECU lost communication with BCM Brand	Network
Sprinter	U014087	No description available	Network
SsangYong	U014087	CAN communication: Motor Control Unit (MCU) message not received Brand	Network

6Related codes

Browse Uxxx codes or U014xx codes.