U0011 — Medium Speed CAN Communication Bus Performance

What Does U0011 Mean?

U0011 is a diagnostic trouble code indicating: Medium Speed CAN Communication Bus Performance. This code relates to the network communication system. The vehicle's computer detected a condition outside normal operating parameters and stored this code.

Symptoms of U0011

⚠️ Check Engine Light (MIL) illuminated
⚠️ Medium Speed CAN Communication Bus not meeting expected output
⚠️ Degraded performance of related system
⚠️ Multiple warning lights on dashboard

Common Causes

🔍 Medium Speed CAN Communication Bus degraded from age or contamination
🔍 Mechanical wear in Medium Speed CAN Communication Bus or related parts
🔍 Restriction or blockage affecting Medium Speed CAN Communication Bus
🔍 Calibration drift in Medium Speed CAN Communication Bus

Frequently Asked Questions

What does U0011 mean?

U0011 indicates: Medium Speed CAN Communication Bus Performance. The vehicle's computer has detected that the Medium Speed CAN Communication Bus is not operating within its expected parameters and stored this diagnostic trouble code.

Can I drive with code U0011?

You can drive short distances for essential trips, but schedule a diagnosis soon. Driving with U0011 for extended periods may cause additional problems.

How much does it cost to fix U0011?

Repair costs for U0011 typically range from $50 to $400, depending on the root cause. Simple wiring or connector repairs are on the lower end, while component replacement costs more. A proper diagnosis ($80–$150 at most shops) will identify the exact cause before committing to expensive parts.

What To Do Next

Possible Fixes

🔧 Inspect Medium Speed CAN Communication Bus for contamination or wear
🔧 Replace Medium Speed CAN Communication Bus
🔧 Address any related mechanical faults

1
Find your vehicle above
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2
Check for recalls
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if covered.
3
Get a professional diagnosis
A code alone doesn't identify the exact failed part. A diagnostic ($50–$150) pinpoints the root cause.

U0011: Medium Speed CAN Communication Bus Performance