U0005
High Speed CAN Communication Bus (+) High
2012-2015 BMW 320i 2.0L I4 Turbo N20
High SeverityNetworkGeneric (SAE)
Description
The CAN High wire voltage is higher than expected, indicating a short to battery voltage.
Symptoms
- CAN bus communication failure
- Multiple module faults
- Warning lights on
Common Causes
- CAN H wire shorted to battery power
- Wiring harness damage
- Module internal fault driving CAN H high
Diagnostic Steps
- Measure CAN H voltage (should not exceed 4V)
- Inspect wiring for shorts to power wires
- Disconnect modules to isolate fault
- Check for wiring harness rub-through
Repair Notes
Repair the short to power on CAN H. Often caused by wiring harness rubbing against sharp edge.
Related Codes
Other Network Codes
- U0001High Speed CAN Communication Bus
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0006High Speed CAN Communication Bus (-) Open
- U0007High Speed CAN Communication Bus (-) Low
- U0008High Speed CAN Communication Bus (-) High
- U0009High Speed CAN Communication Bus Shorted Together
- U0010Medium Speed CAN Communication Bus
- U0028Vehicle Communication Bus A Performance
U0005 on Other Vehicles
Common Questions
What does code U0005 mean on a 2012-2015 BMW 320i?
U0005 stands for "High Speed CAN Communication Bus (+) High". The CAN High wire voltage is higher than expected, indicating a short to battery voltage.
What are the symptoms of U0005 on a BMW 320i?
Common symptoms of U0005 include: CAN bus communication failure, Multiple module faults, Warning lights on.
What causes U0005 on a 2012-2015 BMW 320i?
Common causes of U0005 include: CAN H wire shorted to battery power, Wiring harness damage, Module internal fault driving CAN H high.