Fault code lookup

NetworkU0425

Serious

Severity: Serious - have it checked soon

Invalid data received from auxiliary heater control module

24 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

  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 24

BrandCodeDescriptionSystem
Ashok Leyland CVU0425No description available Network
BAIC MotorU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
BYDU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
CheryU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
DaewooU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
DFFSU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
DFFXU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
DFXKU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
EOBDU0425Kehtetu andme saadud lisakütteseadme juhtmoodulilt BrandNetwork
GeelyU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
GMU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
Great WallU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
HafeiU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
HoldenU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
HyundaiU0425No description available Network
Land RoverU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
OpelU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
PeugeotU0425No description available Network
PorscheU0425No description available Network
SaabU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
MG (SAIC)U0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
TataU0425Invalid Data Received From Auxiliary Heater Control Module BrandNetwork
ToyotaU0425Invalid data received from auxiliary heater control module BrandNetwork
VolkswagenU0425Implausible data received from aux. heater control module 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.

5Related codes

Browse Uxxx codes or U042xx codes.

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