NetworkU1219

Serious

Severity: Serious - have it checked soon

Automatic release electronic parking brake failure

9 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 braking system. Have braking checked promptly.

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 9

Brand	Code	Description	System
Chery	U1219	Lost communication with High Voltage Box Brand	Network
Daewoo	U1219	Loss of serial communications for class 2 devices Brand	Network
DFFS	U1219	Longitudinal acceleration signal invalid Brand	Network
EOBD	U1219	Elektromos kézifék jel Brand	Network
GM	U1219	Loss of serial communications for class 2 devices Brand	Network
Maserati	U1219	Lost Communication with Clock Module Brand	Network
Peugeot	U1219	No description available	Network
Saab	U1219	Loss of serial communications for class 2 devices Brand	Network
Toyota	U1219	Automatic release electronic parking brake failure 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 5

These 7-character codes are manufacturer-specific variants of U1219 and may be reported by some scan tools.

Brand	Code	Description	System
Mercedes-Benz	U121982	Communication with control unit 'COMMUNICATION MODULE' has a malfunction. Counter error. Brand	Network
Mercedes-Benz	U121983	Communication with control unit 'COMMUNICATION MODULE' has a malfunction. CRC error. Brand	Network
SsangYong	U121983	checksum error Brand	Network
Mercedes-Benz	U121986	Communication with control unit 'COMMUNICATION MODULE' has a malfunction. Signal error. Brand	Network
Mercedes-Benz	U121987	Communication with control unit 'COMMUNICATION MODULE' has a malfunction. Missing message. Brand	Network

6Related codes

Browse Uxxx codes or U121xx codes.