BMW iX

U3000

Warning

Control Module Internal Fault (PCM/BMS)

Severity
Warning
Category
Network
Code Type
Manufacturer Specific
Applicable Regions
US, EU

What does U3000 mean?

U-code U3000 means "Control Module Internal Fault (PCM/BMS)". It is a manufacturer-specific diagnostic trouble code (DTC) in the vehicle network (CAN/LIN bus). A fault has been detected in the control module internal fault (pcm/bms) — the control module has logged this condition during self-diagnostics. This warning should be addressed within the next few days to avoid further damage. This code applies to OBD-II compliant electric and hybrid vehicles.

Possible Causes

  • Damaged CAN or LIN bus wiring
  • Faulty or non-responsive control module
  • Software or firmware corruption in the module
  • Power supply or ground issue at the module

Recommended Actions

  1. 1 Avoid aggressive driving and schedule a diagnostic appointment within the next 1–3 days
  2. 2 Scan for all DTCs with an OBD-II scanner — note any related codes stored alongside U3000
  3. 3 Inspect the vehicle network (CAN/LIN bus) component and its wiring for visible damage
  4. 4 Check for water intrusion in connector areas and clean contacts if corroded
  5. 5 Clear the DTC, road-test the vehicle, and re-scan to confirm whether the fault returns
  6. 6 If the fault persists after inspection and clearing, consult an EV-certified technician for component replacement

This code applies to all vehicles. View generic U3000 information →