NetworkU3001

Serious

Severity: Serious - have it checked soon

Control Module Improper Shutdown Performance

28 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 28

Brand	Code	Description	System
Ashok Leyland CV	U3001	Power Supply Sensor. Sensor A. - Low Signal Brand	Network
BAIC Motor	U3001	Control Module Improper Shutdown Brand	Network
Mercedes-Benz	U3001	Control Module Improper Shutdown Performance SAE	Network
BYD	U3001	Control Module Improper Shutdown Brand	Network
Chery	U3001	Control Module Improper Shutdown Brand	Network
Daewoo	U3001	Control Module Improper Shutdown Brand	Network
DFFS	U3001	Control Module Improper Shutdown Brand	Network
DFFX	U3001	Control Module Improper Shutdown Brand	Network
DFXK	U3001	Control Module Improper Shutdown Brand	Network
EOBD	U3001	Control Module Improper Shutdown Performance SAE	Network
Ford	U3001	Control Module Improper Shutdown Performance SAE	Network
Geely	U3001	Control Module Improper Shutdown Brand	Network
GM	U3001	Control Module Improper Shutdown Brand	Network
Great Wall	U3001	Control Module Improper Shutdown Brand	Network
Hafei	U3001	Control Module Improper Shutdown Brand	Network
Holden	U3001	Control Module Improper Shutdown Brand	Network
Honda	U3001	Motor Control Module Improper Shutdown Performance Brand	Network
Hyundai	U3001	Control Module Improper Shutdown Performance SAE	Network
Land Rover	U3001	Control Module Improper Shutdown Performance SAE	Network
Mazda	U3001	Control Module Improper Shutdown Performance SAE	Network
Opel	U3001	Control Module Improper Shutdown Brand	Network
Peugeot	U3001	Control Module Improper Shutdown Performance SAE	Network
Porsche	U3001	Control Module Improper Shutdown Performance SAE	Network
Saab	U3001	Control Module Improper Shutdown Brand	Network
MG (SAIC)	U3001	Control Module Improper Shutdown Brand	Network
Tata	U3001	Control Module Improper Shutdown Performance SAE	Network
Toyota	U3001	Control Module Improper Shutdown Brand	Network
Volkswagen	U3001	Control Module Improper Shutdown Performance 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 13

These 7-character codes are manufacturer-specific variants of U3001 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	U300100	Radar Sensor CAT1 Reset Brand	Network
Volkswagen	U300100	The DTC was found Brand	Network
Mercedes-Benz	U300101	No description available	Network
Mercedes-Benz	U300104	Monitoring level 2 reset 1 Brand	Network
Mercedes-Benz	U30011C	The control unit was switched off improperly. The voltage value is outside the permissible range. Brand	Network
Mercedes-Benz	U30011D	The control unit was switched off improperly. The current value is outside the permissible range. Brand	Network
Mercedes-Benz	U300144	The control unit was switched off improperly. There is an error in the data memory. Brand	Network
Mercedes-Benz	U300146	The control unit was switched off improperly. There is an error in the calibration or parameterization memory. Brand	Network
Mercedes-Benz	U300147	Das Steuergerät wurde unsachgemäß ausgeschaltet. Es liegt ein Laufzeitfehler vor. Brand	Network
Mercedes-Benz	U300196	The control unit was switched off improperly. There is an internal component fault. Brand	Network
Mercedes-Benz	U3001FA	No description available	Network
Mercedes-Benz	U3001FC	Control Module Improper Shutdown Performance. FC Brand	Network
Mercedes-Benz	U3001FE	ECU AURIX Core 2 internal appl watchdog event Brand	Network

6Related codes

Browse Uxxx codes or U300xx codes.