OBD2 code U0014: Medium Speed CAN Communication Bus (-) High
CAN-Low on the medium-speed bus is shorted to battery voltage.
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 battery
- Gateway module routing CAN messages incorrectly
- CAN terminating resistor (120 Ω) drifted out of spec
Tools Required
Interactive Diagnostic
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Parts likely to be the cause (Moteur (général))
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Frequently asked questions about code U0014
What does code U0014 mean? ▾
OBD2 code U0014: Medium Speed CAN Communication Bus (-) High. CAN-Low on the medium-speed bus is shorted to battery voltage.
What are the symptoms of code U0014? ▾
Code U0014 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 U0014? ▾
The most common causes of code U0014 are: CAN-Low shorted to battery, Gateway module routing CAN messages incorrectly, CAN terminating resistor (120 Ω) drifted out of spec. A proper OBD2 diagnostic will pinpoint the exact cause.
Is it serious to drive with code U0014? ▾
Yes, code U0014 is critical (Critical). Avoid driving and consult a professional promptly to prevent major damage.
How do I fix code U0014? ▾
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 battery, Gateway module routing CAN messages incorrectly, CAN terminating resistor (120 Ω) drifted out of spec. Difficulty: Medium · Estimated time: 30-60min.