NetworkU0104

Serious

Severity: Serious - have it checked soon

Lost Communication With Cruise Control Module

36 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 36

Brand	Code	Description	System
Ashok Leyland CV	U0104	Lost Communication With Cruise Control Module SAE	Network
BAIC Motor	U0104	Lost Communication With Cruise Control Module Brand	Network
BYD	U0104	Lost Communication With Cruise Control Module Brand	Network
Chery	U0104	ACC data invalid Brand	Network
Chrysler	U0104	lost communication with cruise control module Brand	Network
Daewoo	U0104	Output Speed Sensor Circuit Intermittent Brand	Network
Daihatsu	U0104	Lost communication with cruise control module Brand	Network
DFFS	U0104	Multi-function switch (CMF) node is lost Brand	Network
DFFX	U0104	Lost Communication With Cruise Control Module Brand	Network
DFXK	U0104	ECU Communication with Cruise Control Module Brand	Network
EOBD	U0104	Ztráta komunikace s modulem tempomatu Brand	Network
Geely	U0104	ECU comm with cruise Contr. module Brand	Network
GM	U0104	Lost Communication With Cruise Control Module Brand	Network
Great Wall	U0104	Lost Communication With Cruise Control Module Brand	Network
Hafei	U0104	Lost Communication With Cruise Control Module Brand	Network
Holden	U0104	Lost Communication with Cruise Control Module Brand	Network
Honda	U0104	Lost Communication With Cruise Control Module SAE	Network
Hyundai	U0104	Lost Communication With Cruise Control Module SAE	Network
Isuzu	U0104	Lost Communication With Cruise Control Module SAE	Network
Land Rover	U0104	Lost Communication With Cruise Control Module SAE	Network
Maserati	U0104	Lost Communication With Cruise Control Module Brand	Network
Mitsubishi	U0104	Lost Communication With Cruise Control Module SAE	Network
Nissan	U0104	Lost communication with cruise control module Brand	Network
Opel	U0104	Lost Communication With Cruise Control Module Brand	Network
Perodua	U0104	Lost communication with cruise control module Brand	Network
Peugeot	U0104	Lost Communication With Cruise Control Module SAE	Network
Porsche	U0104	Lost Communication With Cruise Control Module SAE	Network
Proton	U0104	Lost Communication With Cruise Control Module SAE	Network
Saab	U0104	Lost Communication With Cruise Control Module Brand	Network
Maxus (SAIC)	U0104	Lost Communication With EPS Brand	Network
MG (SAIC)	U0104	Lost Communication With EPS Brand	Network
Suzuki	U0104	LDP) ICC CAM CAN CIR2 Brand	Network
SWM Motor	U0104	ECM and cruise control module communication lost Brand	Network
Tata	U0104	Lost Communication With Cruise Control Module Brand	Network
Toyota	U0104	ECM lost communication with Adaptive Cruise Control (ACC) Brand	Network
Volkswagen	U0104	Lost Communication With Cruise Control Module SAE	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 4

These 7-character codes are manufacturer-specific variants of U0104 and may be reported by some scan tools.

Brand	Code	Description	System
Volvo	U010400	If the signals are missing, DTC BCM- is stored in the Brake control module Brand	Network
SsangYong	U010408	CAN communication: Front Radar Module (FRM) message not received Brand	Network
SsangYong	U010409	CAN bus: ICM no signal Brand	Network
SsangYong	U010487	CAN communication: Electronic Stability Control (ESC) message not received Brand	Network

6Related codes

Browse Uxxx codes or U010xx codes.