NetworkU1010

Serious

Severity: Serious - have it checked soon

Lost communication with the powertrain interface ECU

29 brands affected · Description from Toyota 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 29

Brand	Code	Description	System
Ashok Leyland CV	U1010	No description available	Network
Mercedes-Benz	U1010	No description available	Network
Chery	U1010	14 communication error between BMU and BMS Brand	Network
Daewoo	U1010	Loss of serial communications for class 2 devices Brand	Network
DFFS	U1010	Control unit (CAN) failure Brand	Network
DFXK	U1010	control unit Brand	Network
EOBD	U1010	Juhtseade Brand	Network
GM	U1010	Loss of serial communications for class 2 devices Brand	Network
Great Wall	U1010	Battery sensor communication fault Brand	Network
Holden	U1010	Electronic Control Unit Performance Brand	Network
Hyundai	U1010	No description available	Network
Isuzu	U1010	No description available	Network
Land Rover	U1010	No description available	Network
Mahindra	U1010	No description available	Network
Maserati	U1010	No description available	Network
Mitsubishi	U1010	PHEV ECU Parity/Toggle bit error Brand	Network
Nissan	U1010	No description available	Network
Opel	U1010	Loss of serial communications for class 2 devices Brand	Network
Peugeot	U1010	No description available	Network
Porsche	U1010	No description available	Network
Proton	U1010	PHEV ECU Parity/Toggle bit error Brand	Network
Saab	U1010	Loss of serial communications for class 2 devices Brand	Network
MG (SAIC)	U1010	Init Error Brand	Network
Smart	U1010	No description available	Network
Sprinter	U1010	No description available	Network
Suzuki	U1010	CONTROL UNIT (CAN) Brand	Network
Tata	U1010	No description available	Network
Toyota	U1010	Lost communication with the powertrain interface ECU Brand	Network
Volkswagen	U1010	No description available	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 1

These 7-character codes are manufacturer-specific variants of U1010 and may be reported by some scan tools.

Brand	Code	Description	System
SsangYong	U101087	CAN communication: Electric Heating, Ventilation, and Air Conditioning (EHVC) message not received Brand	Network

6Related codes

Browse Uxxx codes or U101xx codes.