High Speed CAN Communication Bus
2014-2016 Chevrolet Spark EV Electric Motor
Description
General malfunction on the high-speed CAN bus network.
Symptoms
- Multiple warning lights
- Communication errors
- Some systems inoperative
- Scan tool communication issues
Common Causes
- CAN bus wiring damage
- Shorted CAN H or CAN L wire
- Missing termination resistor
- Module failure pulling down bus
- Aftermarket device interference
Diagnostic Steps
- Check for aftermarket devices on OBD port
- Measure CAN bus resistance (should be ~60 ohms)
- Scope CAN H and CAN L signals
- Check for damaged wiring
- Isolate modules one at a time
Repair Notes
CAN bus issues can be complex. Check wiring first. Remove aftermarket devices.
Related Codes
Other Network Codes
- U0002High Speed CAN Communication Bus Performance
- U0003High Speed CAN Communication Bus (+) Open
- U0004High Speed CAN Communication Bus (+) Low
- U0005High Speed CAN Communication Bus (+) High
- 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
U0001 on Other Vehicles
Chevrolet Astro
1995-2005 4.3L V6 Vortec
Chevrolet Avalanche
2002-2006 5.3L V8 Vortec
Chevrolet Avalanche
2002-2006 8.1L V8 Vortec
Chevrolet Avalanche
2007-2013 5.3L V8 Vortec
Chevrolet Avalanche
2007-2013 6.0L V8 Vortec
Chevrolet Aveo
2012-2018 1.6L I4
Chevrolet Beat
2018-2021 1.2L I4
Chevrolet Beretta
1990-1996 2.2L I4
Common Questions
What does code U0001 mean on a 2014-2016 Chevrolet Spark EV?
U0001 stands for "High Speed CAN Communication Bus". General malfunction on the high-speed CAN bus network.
What are the symptoms of U0001 on a Chevrolet Spark EV?
Common symptoms of U0001 include: Multiple warning lights, Communication errors, Some systems inoperative, Scan tool communication issues.
What causes U0001 on a 2014-2016 Chevrolet Spark EV?
Common causes of U0001 include: CAN bus wiring damage, Shorted CAN H or CAN L wire, Missing termination resistor, Module failure pulling down bus, Aftermarket device interference.