U0014
Medium Speed CAN Communication Bus (+) High
U0014 is an OBD-II diagnostic trouble code meaning: Medium Speed CAN Communication Bus (+) High. Common causes: open or short circuit in the positive line of the can bus, wiring harness damage. Estimated repair cost: $6–56.
Symptoms
- Unstable operation of various vehicle systems
- The Check Engine light comes on
- Problems with electronic systems (climate control, audio system, etc.)
- Floating engine speed
- Loss of communication with some control units
Causes
- Open or short circuit in the positive line of the CAN bus
- Wiring harness damage
- Corrosion of contacts in CAN bus connectors
- Malfunction of one of the modules connected to the CAN bus
- Problems with the control unit
How to Fix
- Check the integrity of the CAN bus wiring
- Look for signs of a short to positive
- Check the condition of connectors and contacts
- Diagnose modules connected to the problematic bus
- If necessary, replace damaged wires or connectors
Related codes
Error U0014 by Vehicle Brand
FAQ
What does the U0014 code mean?
U0014 is an OBD-II diagnostic trouble code that indicates: Medium Speed CAN Communication Bus (+) High
What causes a U0014 error code?
The most common causes of U0014 include: Open or short circuit in the positive line of the CAN bus; Wiring harness damage; Corrosion of contacts in CAN bus connectors; Malfunction of one of the modules connected to the CAN bus.
How do I fix a U0014 diagnostic trouble code?
To fix U0014: Check the integrity of the CAN bus wiring. Look for signs of a short to positive. Check the condition of connectors and contacts. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0014?
Do not drive — repair immediately
How much does it cost to fix U0014?
The estimated repair cost for U0014 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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