Fault code lookup

NetworkU025E

Serious

Severity: Serious - have it checked soon

Lost communication with electronic brake booster control module 'A'

7 brands affected · Description from Toyota data.

Key terms: Boost pressure: extra air pressure made by a turbo or supercharger · Control module: a small computer that runs one part of the car

Safety: This code relates to the braking system or brake assist. Braking may be affected.

1What it means in plain English

Control modules in the car cannot communicate with each other over the vehicle network.

2Common causes

  1. Wiring or connector fault on the communication bus
  2. Faulty control module
  3. Low battery voltage or poor ground
  4. Water ingress in a connector or module
  5. 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 7

BrandCodeDescriptionSystem
Ashok Leyland CVU025ENo description available Network
BYDU025ECommunication fault between motor controller and ACM BrandNetwork
EOBDU025EKaotatud side elektroonilise pidurijõuanduri juhtmooduliga 'A' BrandNetwork
Maxus (SAIC)U025ELost Communication With EBOOST BrandNetwork
MG (SAIC)U025ELost Communication With EBOOST BrandNetwork
SuzukiU025ENo description available Network
ToyotaU025ELost communication with electronic brake booster control module 'A' BrandNetwork

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 9

These 7-character codes are manufacturer-specific variants of U025E and may be reported by some scan tools.

BrandCodeDescriptionSystem
Mercedes-BenzU025E02Das Signal WhlDir_FL_Stat_Bckp_ST3 wird mit einem unltigem Wert empfangen BrandNetwork
Mercedes-BenzU025E29Das Signal HAD_Stat_EBB_ST3 wird mit einem ungültigem Wert empfangen BrandNetwork
Mercedes-BenzU025E82Communication with control unit 'Electronic Brake Power' has a malfunction. Counter error. BrandNetwork
Mercedes-BenzU025E83Protocol Error EBB BrandNetwork
Mercedes-BenzU025E86Ethernet communication error for EBB (Electronic brake booster) BrandNetwork
Mercedes-BenzU025E87Lost Communication EBB BrandNetwork
Mercedes-BenzU025E89Communication with control unit 'Electronic brake booster' has a malfunction. An error during data transfer has occurred. BrandNetwork
Mercedes-BenzU025E8FBotschaft von EBB SG wird zeitweise nicht empfangen BrandNetwork
Mercedes-BenzU025EE0Botschaft vom EPS-SG wird zeitweise nicht empfangen BrandNetwork

6Related codes

  • U0250 Lost Communication With Impact Classification System Module
  • U0251 Lost Communication With Running Board Control Module B
  • U0252 Lost Communication With Lighting Control Module - Rear B
  • U0253 Lost Communication With Accessory Protocol Interface Module
  • U0254 Lost Communication With Remote Start Module
  • U0255 Lost Communication With Front Display Interface Module
  • U0256 Lost Communication With Front Controls Interface Module A
  • U0257 Lost Communication With Front Controls/Display Interface Module
  • U0258 Lost communication with battery cooling system
  • U0259 Lost communication with special purpose vehicle control module 'A'
  • U025A Lost communication with gear P
  • U025B Lost communication with special purpose vehicle control module 'C'

Browse Uxxx codes or U025xx codes.

OpenDTC - independent fault code reference