NetworkU0122

Serious

Severity: Serious - have it checked soon

Lost Communication With Vehicle Dynamics Control Module

39 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 39

Brand	Code	Description	System
Ashok Leyland CV	U0122	Lost Communication With Vehicle Dynamics Control Module SAE	Network
BAIC Motor	U0122	CAN ABS Communication Brand	Network
Mercedes-Benz	U0122	Lost Communication With Vehicle Dynamics Control Module SAE	Network
BYD	U0122	Communication with low voltage BMS fault Brand	Network
Chery	U0122	Lost Communication With Vehicle Dynamics Control Module Brand	Network
Daewoo	U0122	Lost Communication With Vehicle Dynamics Control Module Brand	Network
Daihatsu	U0122	VSC receive abnormal Brand	Network
DFFS	U0122	Communication with ECM lost Brand	Network
DFFX	U0122	CAN and ESC communication timeout Brand	Network
DFXK	U0122	Lost Communication With Vehicle Dynamics Control Module Brand	Network
EOBD	U0122	Kaotatud side sõiduki dünaamika juhtimismooduliga Brand	Network
Ford	U0122	ABS/EBS communication failure Brand	Network
Geely	U0122	Communication Fault Between CAN and TCS Brand	Network
GM	U0122	Lost Communication With Vehicle Dynamics Control Module Brand	Network
Great Wall	U0122	ESP communication Brand	Network
Hafei	U0122	Lost Communication With Vehicle Dynamics Control Module Brand	Network
Holden	U0122	Lost Communication with Vehicle Stability Control Module Brand	Network
Honda	U0122	Lost Communication With Vehicle Dynamics Control Module SAE	Network
Hyundai	U0122	Lost Communication With Vehicle Dynamics Control Module SAE	Network
Isuzu	U0122	Lost Communication With Vehicle Dynamics Control Module SAE	Network
Land Rover	U0122	Lost communication with vehicle dynamics control module Brand	Network
Maserati	U0122	Lost communication with vehicle dynamics control module Brand	Network
Mazda	U0122	ABS/EBS communication failure Brand	Network
Mitsubishi	U0122	ASC CAN timeout Brand	Network
Nissan	U0122	Lost Communication With Vehicle Dynamics Control Module SAE	Network
Opel	U0122	Lost Communication With Vehicle Dynamics Control Module Brand	Network
Perodua	U0122	VSC receive abnormal Brand	Network
Peugeot	U0122	Lost Communication With Vehicle Dynamics Control Module SAE	Network
Proton	U0122	ASC CAN timeout Brand	Network
Saab	U0122	Lost Communication With Vehicle Dynamics Control Module Brand	Network
Maxus (SAIC)	U0122	Lost Communication With AFS Brand	Network
MG (SAIC)	U0122	Lost Communication With ABS Brand	Network
Smart	U0122	Lost Communication With Vehicle Dynamics Control Module SAE	Network
Subaru	U0122	Improvement to misfire feeling while driving, and DTC Brand	Network
Suzuki	U0122	Lost Comm with ESPCon Mod Brand	Network
SWM Motor	U0122	ECM Vehicle Dynamic Information Brand	Network
Tata	U0122	Missing Message Error With ABS/ESP Brand	Network
Toyota	U0122	Communication between CAN and ESC lost Brand	Network
Volkswagen	U0122	Lost Communication With Vehicle Dynamics 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 22

These 7-character codes are manufacturer-specific variants of U0122 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	U012200	Lost Communication With Vehicle Dynamics Control Module Brand	Network
Mercedes-Benz	U01221D	Die Kommunikation mit dem Steuergerät 'Traktionssystem' hat Funktionsstörung.Es liegt ein ungültiges Signal vor. Brand	Network
Mercedes-Benz	U012220	Invalid Wheel RPM Signal Brand	Network
Mercedes-Benz	U012222	Invalid Wheel RPM Backup Signal Brand	Network
Mercedes-Benz	U012241	Communication with control unit 'Traction system' has a malfunction. There is a general checksum error. Brand	Network
Mercedes-Benz	U012264	Communication with control unit 'Traction system' has a malfunction. Signal Plausibility Failure Brand	Network
Mercedes-Benz	U012267	Signal error 'SPCR_AS_Dsabl' or 'SPCR_AS_Off_Rq' or 'SPCR_Md' (ESP) Brand	Network
Mercedes-Benz	U012281	Communication with control unit 'Traction system' has a malfunction. Incorrect data were received. Brand	Network
Mercedes-Benz	U012282	Communication with ESP has a malfunction.SQC failure Brand	Network
Mercedes-Benz	U012283	Protocol Error ESP Brand	Network
Mercedes-Benz	U012286	Communication with control unit 'TRACTION SYSTEM' has a malfunction. Signal error. Brand	Network
Mercedes-Benz	U012287	Timeout Error ESP Brand	Network
SsangYong	U012287	CAN time-out FCM Brand	Network
Mercedes-Benz	U012289	Communication with control unit 'Traction system' has a malfunction. An error during data transfer has occurred. Brand	Network
Mercedes-Benz	U01228C	Es liegt ein Wegstreckensignalfehler vor Brand	Network
Mercedes-Benz	U01228D	Bedientaste (n) hängt Brand	Network
Mercedes-Benz	U0122EF	Communication with control unit 'Traction system' has a malfunction. The 'Eco event vehicle acceleration' message is missing. Brand	Network
Mercedes-Benz	U0122FA	Timeout error ESP (LDC_Disp_Rq_ESP_AR, EPKB_Stat_AR2) Brand	Network
Mercedes-Benz	U0122FB	Timeout error ESP (VehSpd_X_AR2) Brand	Network
Mercedes-Benz	U0122FC	Communication error ESP (EPKB_Stat_Pr2) Brand	Network
Mercedes-Benz	U0122FD	Communication error ESP (VehSpd_X_Pr2) Brand	Network
Mercedes-Benz	U0122FE	Signal error 'BrkTrq_D_V2' (ESP) Brand	Network

6Related codes

Browse Uxxx codes or U012xx codes.