NetworkU017B

Serious

Severity: Serious - have it checked soon

Lost communication with restraints system sensor L

19 brands affected · Description from Toyota data.

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

Safety: This code relates to the airbag or seat-belt restraint system. An airbag may not deploy in a crash.

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 19

Brand	Code	Description	System
Ashok Leyland CV	U017B	No description available	Network
BAIC Motor	U017B	Lost Communication With Restraints System Sensor L Brand	Network
BYD	U017B	Lost Communication With Restraints System Sensor L Brand	Network
Chery	U017B	Lost Communication With Restraints System Sensor L Brand	Network
Daewoo	U017B	Lost Communication With Restraints System Sensor L Brand	Network
DFFS	U017B	Lost Communication With Restraints System Sensor L Brand	Network
DFFX	U017B	Lost Communication With Restraints System Sensor L Brand	Network
DFXK	U017B	Lost Communication With Restraints System Sensor L Brand	Network
EOBD	U017B	Kaotatud side turvasüsteemi anduriga L Brand	Network
Geely	U017B	Lost Communication With Restraints System Sensor L Brand	Network
GM	U017B	Lost Communication With Restraints System Sensor L Brand	Network
Great Wall	U017B	Lost Communication With Restraints System Sensor L Brand	Network
Hafei	U017B	Lost Communication With Restraints System Sensor L Brand	Network
Hyundai	U017B	No description available	Network
Land Rover	U017B	Lost Communication With 'Restraints System Sensor L' Brand	Network
Peugeot	U017B	No description available	Network
Saab	U017B	Lost Communication With Restraints System Sensor L Brand	Network
MG (SAIC)	U017B	Lost Communication With Restraints System Sensor L Brand	Network
Toyota	U017B	Lost communication with restraints system sensor L 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.

5Related codes

Browse Uxxx codes or U017xx codes.