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TuningBot DTC Database · v4.37.14

U02B4 Lost Communication With Front Radar Module A

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

U · NetworkNetworkOBD2

What U02B4 means

U02B4
Lost Communication With Front Radar Module A Generic · network Data confidence 65%

The control module stopped receiving expected network messages from the Front Radar Module A node on the vehicle communication bus.

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

U02 range
U0200U0201U0202U0203U0204U0205U0206U0207U0208U0209U020AU020BU020CU020DU0210U0211U0212U0213

How to read U02B4

U

Network: communication between control units.

0

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

2B4

Specific fault index within the subsystem.

Frequently asked questions about U02B4

What does U02B4 mean?

Lost Communication With Front Radar Module A. The control module stopped receiving expected network messages from the Front Radar Module A node on the vehicle communication bus.

Is U02B4 generic or manufacturer-specific?

U02B4 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove U02B4 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 U02B4 is removable in your case.

Other file services

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