NetworkU0168

Serious

Severity: Serious - have it checked soon

Lost Communication With Vehicle Security Control Module

32 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 32

Brand	Code	Description	System
Ashok Leyland CV	U0168	Lost Communication With Vehicle Security Control Module SAE	Network
BAIC Motor	U0168	Lost Communication With Vehicle Security Control Module Brand	Network
Mercedes-Benz	U0168	Lost Communication With Vehicle Security Control Module SAE	Network
BYD	U0168	ECM failed to communicate with keyless system Brand	Network
Chery	U0168	Lost communication with VCU Brand	Network
Daewoo	U0168	Vehicle Speed Signal Range/Performance Brand	Network
DFFS	U0168	Lost communication with radar controller Brand	Network
DFFX	U0168	Lost Communication With Vehicle Security Control Module Brand	Network
DFXK	U0168	Lost Communication With Vehicle Security Control Module Brand	Network
EOBD	U0168	Kaotatud side sõiduki turvasüsteemi juhtmoduliga Brand	Network
Geely	U0168	Lost Communication With Vehicle Security Control Module Brand	Network
GM	U0168	Comunicación Perdida con Mód Ctrl Seguridad Vehículo Brand	Network
Great Wall	U0168	Lost Communication With Vehicle Security Control Module Brand	Network
Hafei	U0168	Lost Communication With Vehicle Security Control Module Brand	Network
Holden	U0168	Lost Communication with Immobilizer Control Module Brand	Network
Hyundai	U0168	Lost Communication With Vehicle Security Control Module SAE	Network
Land Rover	U0168	Lost communication with vehicle security control module Brand	Network
Maserati	U0168	Lost Communication With Vehicle Security Control Module (Sentry Key Remote Entry Module SKREEM / Wireless Control Module WCM) Brand	Network
Mitsubishi	U0168	WCM/KOS CAN timeout Brand	Network
Opel	U0168	Comunicación Perdida con Mód Ctrl Seguridad Vehículo Brand	Network
Peugeot	U0168	Lost Communication With Vehicle Security Control Module SAE	Network
Porsche	U0168	Lost Communication With Vehicle Security Control Module SAE	Network
Proton	U0168	WCM/KOS CAN timeout Brand	Network
Saab	U0168	Verbindungsverlust zum Steuergerät Fahrzeugsicherheit Brand	Network
Maxus (SAIC)	U0168	lost communication with ATSSM Brand	Network
MG (SAIC)	U0168	lost communication with ATSSM Brand	Network
Smart	U0168	Lost Communication With Vehicle Security Control Module SAE	Network
Sprinter	U0168	Lost Communication With Vehicle Security Control Module SAE	Network
Suzuki	U0168	Lost Communication With Vehicle Security Control Module SAE	Network
Tata	U0168	Lost Communication With Vehicle Security Control Module Brand	Network
Toyota	U0168	Lost communication with vehicle security control module Brand	Network
Volkswagen	U0168	SAE: No Communications with Vehicle Security 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 24

These 7-character codes are manufacturer-specific variants of U0168 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	U016800	Lost Communication With Vehicle Security Control Module Brand	Network
Mercedes-Benz	U016802	Communication with the electronic ignition lock has a malfunction. There is a general signal fault. Brand	Network
Mercedes-Benz	U016808	Communication with the electronic ignition lock has a malfunction. There is a signal fault or the message is faulty. Brand	Network
Mercedes-Benz	U016829	EVC Change detected (EIS/Electronic Ignition Switch Modul) Brand	Network
Mercedes-Benz	U016864	Communication with the electronic ignition lock has a malfunction. There is an implausible signal. Brand	Network
Mercedes-Benz	U016882	Communication with the electronic ignition lock has a malfunction. Counter error. Brand	Network
Mercedes-Benz	U016883	value of signal protection calculation incorrect EIS message check error Brand	Network
Mercedes-Benz	U016886	Communication error EIS (Ign_Stat_Pr2) Brand	Network
Mercedes-Benz	U016887	Timeout Error EIS Brand	Network
Mercedes-Benz	U016888	Ethernet Timeout Error for EIS (Electronic Ignition Switch Modul) Brand	Network
Mercedes-Benz	U01688A	NIR Eeprom Error Brand	Network
Mercedes-Benz	U01688B	CAN Rx PDU PN14_Stat Receive Timeout Brand	Network
Mercedes-Benz	U01688C	CAN Rx PDU Ign_Veh_Stat Receive Timeout Brand	Network
Mercedes-Benz	U01688D	Signal 'LISB48_CellVolt_LimMin' Brand	Network
Mercedes-Benz	U01688E	Signal 'LISB48_BatCpctyNom_0c8ee4f5' timeout Brand	Network
Mercedes-Benz	U01688F	CAN timeout Brand	Network
Mercedes-Benz	U01689C	Sys Not Calibrated Brand	Network
Mercedes-Benz	U01689D	Variant Not Coded Brand	Network
Mercedes-Benz	U0168A0	CAN messages invalid Brand	Network
Mercedes-Benz	U0168EE	Communication with the electronic ignition lock has a malfunction. Counter byte when corresponding SAE Code is used more than one time Brand	Network
Mercedes-Benz	U0168FA	Communication with the electronic ignition lock has a malfunction. Counter byte when corresponding SAE Code is used more than one time Brand	Network
Mercedes-Benz	U0168FD	ComScl PDU_RTC_Stat1_AR2 Timeout Error Brand	Network
Mercedes-Benz	U0168FE	SG Ign_Stat_Pr2 - Timeout Error Brand	Network
Mercedes-Benz	U0168FF	Communication with the electronic ignition lock has a malfunction. Counter byte when corresponding SAE Code is used more than one time Brand	Network

6Related codes

Browse Uxxx codes or U016xx codes.