Check Engine Code
U0001
High Speed CAN Communication Bus
Severity: high
DIY difficulty: 4/5
Typical cost: $50–$1500
What U0001 means
Modules cannot reliably communicate over the high-speed CAN bus.
Symptoms
- Multiple warning lights
- Erratic system behavior
- Limp mode
- No-start in extreme cases
Likely causes (most common first)
- Damaged CAN wiring
- Failed module
- Bad ground
- Weak battery
Can I keep driving?
High — risk of damage if ignored
Typical repair cost
DIY fixes can start near $50 (parts only). Shop repairs for U0001 typically run up to $1500 depending on the underlying cause and vehicle. Start with the most common cause — Damaged CAN wiring — before throwing parts at it.
Recommended parts & tools for U0001
Our buyer’s guides cover the tools and parts that pair with AXLY:
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