OBD2 code U0013: Medium Speed CAN Communication Bus (-) Low
The CAN-Low signal of the medium-speed bus is shorted to ground.
Detected Root Component
Network Component
Observed Symptoms
- Multiple warning lights may illuminate
- Affected modules may go into limp mode or shut down
- Specific functions inoperative depending on module
- Diagnostic tools may show communication faults
Possible Causes
- CAN-Low shorted to ground
- Water ingress in door connector
- Gateway module routing CAN messages incorrectly
Tools Required
Interactive Diagnostic
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Parts likely to be the cause (Moteur (général))
Moteur (général)
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Frequently asked questions about code U0013
What does code U0013 mean? ▾
OBD2 code U0013: Medium Speed CAN Communication Bus (-) Low. The CAN-Low signal of the medium-speed bus is shorted to ground.
What are the symptoms of code U0013? ▾
Code U0013 may cause: Multiple warning lights may illuminate, Affected modules may go into limp mode or shut down, Specific functions inoperative depending on module, Diagnostic tools may show communication faults. The intensity of these symptoms varies depending on the vehicle and driving conditions.
What causes code U0013? ▾
The most common causes of code U0013 are: CAN-Low shorted to ground, Water ingress in door connector, Gateway module routing CAN messages incorrectly. A proper OBD2 diagnostic will pinpoint the exact cause.
Is it serious to drive with code U0013? ▾
Yes, code U0013 is critical (Critical). Avoid driving and consult a professional promptly to prevent major damage.
How do I fix code U0013? ▾
Start by reading the code with an OBD2 scanner, then follow the interactive decision tree on this page. Priority causes to check: CAN-Low shorted to ground, Water ingress in door connector, Gateway module routing CAN messages incorrectly. Difficulty: Medium · Estimated time: 30-60min.