U0011
Medium Speed CAN Communication Bus Performance
The medium-speed CAN bus is operating but with degraded performance — frame errors or excessive error counters. Comfort and infotainment functions may operate intermittently.
The medium-speed CAN bus is operating but with degraded performance — frame errors or excessive error counters. Comfort and infotainment functions may operate intermittently.
Common causes
- high
Corrosion in body harness connectors
One of the most commonly reported causes for this code — check this first.
Typical part cost: $90-1100
- medium
One module sending malformed frames
A plausible cause — test and verify before replacing parts.
Typical part cost: $90-1100
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does U0011 mean?
U0011 means "Medium Speed CAN Communication Bus Performance". It is a generic OBD-II code that points to a fault in the network / communication.
What are the most common causes of U0011?
corrosion in body harness connectors; one module sending malformed frames; gateway module routing can messages incorrectly — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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