NetworkU1112

Serious

Severity: Serious - have it checked soon

Function restriction due to implausible message(s)

30 brands affected · Description from Volkswagen data.

Key terms: Control module: a small computer that runs one part of the car

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 30

Brand	Code	Description	System
Mercedes-Benz	U1112	Valid except code ZQ0 Brand	Network
BYD	U1112	SRS-ABG CAN timeout/Not equipped Brand	Network
Chery	U1112	SRS-ABG CAN timeout/Not equipped Brand	Network
Daewoo	U1112	Loss of serial communications for class 2 devices Brand	Network
Daihatsu	U1112	CMB communication interrupted Brand	Network
DFFS	U1112	CCAN_Radar0F2 message timeout Brand	Network
DFFX	U1112	SRS-ABG CAN timeout/Not equipped Brand	Network
EOBD	U1112	Nepoznato Brand	Network
Geely	U1112	SRS-ABG CAN timeout/Not equipped Brand	Network
GM	U1112	Loss of serial communications for class 2 devices Brand	Network
Great Wall	U1112	SRS-ABG CAN timeout/Not equipped Brand	Network
Hafei	U1112	SRS-ABG CAN timeout/Not equipped Brand	Network
Holden	U1112	Lost Communication With Battery Charger Control Module Brand	Network
Hyundai	U1112	No description available	Network
Mahindra	U1112	No description available	Network
Mitsubishi	U1112	SRS-ABG CAN timeout/Not equipped Brand	Network
Nissan	U1112	No description available	Network
Opel	U1112	Loss of serial communications for class 2 devices Brand	Network
Perodua	U1112	CMB communication interrupted Brand	Network
Peugeot	U1112	No description available	Network
Porsche	U1112	No description available	Network
Proton	U1112	SRS-ABG CAN timeout/Not equipped Brand	Network
Saab	U1112	Loss of serial communications for class 2 devices Brand	Network
MG (SAIC)	U1112	On-board Charge CAN Missing Brand	Network
Smart	U1112	No description available	Network
Sprinter	U1112	Valid except code ZQ0 Brand	Network
Suzuki	U1112	No description available	Network
Tata	U1112	Gas ECU Communication Error Brand	Network
Toyota	U1112	Slow charging communication abnormality Brand	Network
Volkswagen	U1112	Function restriction due to implausible message(s) 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 3

These 7-character codes are manufacturer-specific variants of U1112 and may be reported by some scan tools.

Brand	Code	Description	System
Hyundai	U111200	If LIN communication error between battery sensor and ECM is detected, ECM sets DTC Brand	Network
Volkswagen	U111200	Fault finding Brand	Network
SsangYong	U111202	CAN communication: FRM_259 communication error - timeout Brand	Network

6Related codes

Browse Uxxx codes or U111xx codes.