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Home/DTC Codes/Chevrolet/Spark EV/2014-2016 Electric Motor/U0008
U0008

High Speed CAN Communication Bus (-) High

2014-2016 Chevrolet Spark EV Electric Motor

High SeverityNetworkGeneric (SAE)

Description

The CAN Low wire voltage is higher than expected, indicating a short to power.

Symptoms

  • CAN bus failure
  • Multiple communication errors
  • Systems unresponsive

Common Causes

  • CAN L shorted to battery voltage
  • Wiring harness damage
  • Module fault driving CAN L high

Diagnostic Steps

  1. Measure CAN L voltage
  2. Disconnect modules to isolate
  3. Inspect wiring for shorts to power circuits
  4. Check harness routing near power wires

Repair Notes

Repair CAN L short to power. Ensure CAN wiring is properly separated from power wiring.

Related Codes

U0001High Speed CAN Communication BusU0006High Speed CAN Communication Bus (-) OpenU0007High Speed CAN Communication Bus (-) Low

Other Network Codes

U0008 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 U0008 mean on a 2014-2016 Chevrolet Spark EV?

U0008 stands for "High Speed CAN Communication Bus (-) High". The CAN Low wire voltage is higher than expected, indicating a short to power.

What are the symptoms of U0008 on a Chevrolet Spark EV?

Common symptoms of U0008 include: CAN bus failure, Multiple communication errors, Systems unresponsive.

What causes U0008 on a 2014-2016 Chevrolet Spark EV?

Common causes of U0008 include: CAN L shorted to battery voltage, Wiring harness damage, Module fault driving CAN L high.

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