U2012
Communication Bus Error
U2012 is an OBD-II diagnostic trouble code meaning: Communication Bus Error. Common causes: broken or damaged can bus wires, corrosion or poor contact in connectors. Estimated repair cost: $17–111.
Symptoms
- Incorrect dashboard readings
- Malfunctions of electronic systems
- The appearance of other errors on the on-board computer
- The car goes into emergency mode
- Problems starting the engine
Causes
- Broken or damaged CAN bus wires
- Corrosion or poor contact in connectors
- Malfunction of one of the electronic modules
- Software error in the module
- Problems with power supply of electronic units
How to Fix
- Visual inspection of the CAN bus wiring for damage
- Checking the condition of connectors and contacts
- Diagnostics of electronic modules for errors
- Resetting errors and checking for reoccurrence
- Replacing damaged wiring sections
- Updating module software if necessary
Related codes
FAQ
What does the U2012 code mean?
U2012 is an OBD-II diagnostic trouble code that indicates: Communication Bus Error
What causes a U2012 error code?
The most common causes of U2012 include: Broken or damaged CAN bus wires; Corrosion or poor contact in connectors; Malfunction of one of the electronic modules; Software error in the module.
How do I fix a U2012 diagnostic trouble code?
To fix U2012: Visual inspection of the CAN bus wiring for damage. Checking the condition of connectors and contacts. Diagnostics of electronic modules for errors. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U2012?
Yes, but get it checked soon
How much does it cost to fix U2012?
The estimated repair cost for U2012 is $17–111. Actual cost depends on your vehicle, location, and labor rates.
See also: Russian version · NationStat