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TuningBot DTC Database · v4.37.14

U0014 Controller area network (CAN) data bus: medium speed bus(+) - voltage high

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

U · NetworkNetworkOBD2

What U0014 means

U0014
Controller area network (CAN) data bus: medium speed bus(+) - voltage high Generic · network Data confidence 65%

The control module detected that the Controller area network (CAN) data bus: medium speed bus(+) voltage stayed above the expected range.

Symptoms

  • Multiple systems may log communication codes
  • Possible loss of gauge or system functions

Possible causes

  • Bus wiring open or short circuit
  • Terminating resistor fault
  • A faulty node disturbing the bus
  • Connector corrosion

Recommended checks

  • Measure CAN-H/CAN-L voltages and bus resistance
  • Map communicating vs silent modules with a full scan
  • Inspect harness sections prone to chafing
  • Check for water ingress at connectors

Related and nearby codes

How to read U0014

U

Network: communication between control units.

0

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

014

Specific fault index within the subsystem.

Frequently asked questions about U0014

What does U0014 mean?

Controller area network (CAN) data bus: medium speed bus(+) - voltage high. The control module detected that the Controller area network (CAN) data bus: medium speed bus(+) voltage stayed above the expected range.

Is U0014 generic or manufacturer-specific?

U0014 is a generic OBD-II code: it has the same meaning on every make and model that follows the SAE standard.

Can TuningBot remove U0014 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 U0014 is removable in your case.

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