Hours: 07–23 daily
EN
Tune your file

TuningBot DTC Database · v4.37.15

U04B5 Invalid Data Received from Brake System Control Module B

Generic (OBD-II) interpretation in the TuningBot DTC database.

U · NetworkNetworkOBD2

What U04B5 means

U04B5
Invalid Data Received from Brake System Control Module B Generic · network Data confidence 65%

The control module registered the fault condition described as "Invalid Data Received from Brake System Control Module B".

Symptoms

  • Multiple warning lamps possible
  • Functions of the affected module unavailable

Possible causes

  • CAN bus wiring fault (open, short, chafed harness)
  • Faulty control module loading the bus
  • Connector or terminal corrosion
  • Power supply or ground fault of a module

Recommended checks

  • Perform a full-module scan to map which modules communicate
  • Check CAN bus resistance and voltages at the diagnostic connector
  • Inspect wiring and connectors of the affected module
  • Check module power supply and grounds
  • Disconnect suspect modules one at a time only with a documented procedure

Related and nearby codes

U04 range
U0400U0401U0402U0403U0404U0405U0406U0407U0408U0409U040AU040BU040CU040DU040EU040FU0410U0411

How to read U04B5

U

Network: communication between control units.

0

Generic SAE-standard code: same meaning on every make.

4B5

Specific fault index within the subsystem.

Frequently asked questions about U04B5

What does U04B5 mean?

Invalid Data Received from Brake System Control Module B. The control module registered the fault condition described as "Invalid Data Received from Brake System Control Module B".

Is U04B5 generic or manufacturer-specific?

U04B5 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove U04B5 at file level?

Not guaranteed. Powertrain (P) codes can be reliably disabled in the ECU calibration, but body, chassis and network codes depend on the specific control unit and how the fault is implemented - some can be handled, some cannot. Ask for a quote and our engineers will check your file and tell you, free of charge, whether U04B5 is removable in your case.

Other file services

Stage 1/2/3 TuningDPF RemovalEGR RemovalAdBlue / SCR RemovalDTC RemovalIMMO OFFSpeed Limiter (Vmax)

Understand the system behind this code: Diagnostic Strategy and DTC Logic

ECU tuningDyno-tested results by model and engine See the results →

← Search the full DTC database