NetworkU0151

Serious

Severity: Serious - have it checked soon

Lost Communication With Restraints Control Module

40 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

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 40

Brand	Code	Description	System
Ashok Leyland CV	U0151	Lost Communication With Restraints Control Module SAE	Network
BAIC Motor	U0151	BCM 4 signal lost Brand	Network
Mercedes-Benz	U0151	Lost Communication With Restraints Control Module SAE	Network
BYD	U0151	SRS CAN message timeout Brand	Network
Chery	U0151	CAN-ABM Signal Timeout Brand	Network
Chrysler	U0151	Lost Communication With Restraints Control Module SAE	Network
Daewoo	U0151	Engine Coolant Temperature Circuit Low Input Brand	Network
Daihatsu	U0151	Communication with A/B Brand	Network
DFFS	U0151	Lost communication with airbag control unit Brand	Network
DFFX	U0151	ECM lost communication with airbag Brand	Network
DFXK	U0151	Lost Communication With Restraints Control Module Brand	Network
EOBD	U0151	Side turvasüsteemi juhtmooduliga kadunud Brand	Network
Fiat	U0151	Lost communication with Occupant Restraint Controller Brand	Network
Ford	U0151	Lost Communication With Restraints Control Module SAE	Network
Geely	U0151	SRS CAN message timeout Brand	Network
GM	U0151	Lost Communication With Restraints Control Module Brand	Network
Great Wall	U0151	Lost communication with airbag Brand	Network
Hafei	U0151	Lost Communication With Restraints Control Module Brand	Network
Holden	U0151	Lost Communication with HVAC Control Module Brand	Network
Honda	U0151	Lost Communication With Restraints Control Module SAE	Network
Hyundai	U0151	Lost Communication With Restraints Control Module SAE	Network
Isuzu	U0151	Lost Communication With Restraints Control Module SAE	Network
Land Rover	U0151	Lost Communication With Restraints Control Module SAE	Network
Maserati	U0151	Lost communication with Occupant Restraint Controller (ORC) Brand	Network
Mazda	U0151	Lost Communication With Restraints Control Module SAE	Network
Mitsubishi	U0151	SRS-ABG CAN timeout Brand	Network
Opel	U0151	Lost Communication With Restraints Control Module Brand	Network
Perodua	U0151	Communication with A/B Brand	Network
Peugeot	U0151	Lost Communication With Restraints Control Module SAE	Network
Porsche	U0151	Lost Communication With Restraints Control Module SAE	Network
Proton	U0151	SRS-ABG CAN timeout Brand	Network
Saab	U0151	Lost Communication With Restraints Control Module Brand	Network
Maxus (SAIC)	U0151	Lost Communication With SAS Brand	Network
MG (SAIC)	U0151	Lost Communication With SAS Brand	Network
Smart	U0151	Lost Communication With Restraints Control Module SAE	Network
Subaru	U0151	Lost Communication With Restraints Control Module SAE	Network
Suzuki	U0151	Lost Communication With Restraints Control Module Brand	Network
Tata	U0151	Lost Communication With Restraints Control Module Brand	Network
Toyota	U0151	Communication between ECM and airbag control module (C151) lost Brand	Network
Volkswagen	U0151	No communications with airbag control module; Defective 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 15

These 7-character codes are manufacturer-specific variants of U0151 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	U015100	The communication with the control unit ORC has a malfunction. Brand	Network
Mercedes-Benz	U015129	Signal error 'Bckl_Sw_D_Stat' (ORC) Brand	Network
Mercedes-Benz	U015164	Communication with the supplemental restraint system (SRS) has a malfunction. There is an implausible signal. Brand	Network
SsangYong	U015181	Variant coding error: Audio-Video-Navigation (AVN) specification detection Brand	Network
Mercedes-Benz	U015182	Communication with the supplemental restraint system (SRS) has a malfunction. Counter error. Brand	Network
Mercedes-Benz	U015183	Protocol Error ORC Brand	Network
Mercedes-Benz	U015185	Yawrate or lateral acceleration out of limits for ORC/IS1 (Airbag Control / Integrated Sensor Cluster 1) Brand	Network
Mercedes-Benz	U015186	Communication error ORC (Impact_Pr2) Brand	Network
Mercedes-Benz	U015187	Lost Communication ORC Brand	Network
SsangYong	U015187	CAN communication: Audio-Video-Navigation (AVN) message not received Brand	Network
Mercedes-Benz	U01518F	Invalid IS1 Timestamp Brand	Network
Mercedes-Benz	U0151FA	Timeout error ORC (ORC_Impact_AR2) Brand	Network
Mercedes-Benz	U0151FB	Communication error ORC (Bckl_Sw_Ft_Stat_Pr2) Brand	Network
Mercedes-Benz	U0151FC	Communication with the supplemental restraint system (SRS) has a malfunction. Counter byte when corresponding SAE Code is used more than one time Brand	Network
Mercedes-Benz	U0151FF	Communication with the supplemental restraint system (SRS) has a malfunction. Counter byte when corresponding SAE Code is used more than one time Brand	Network

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