U0002
High Speed CAN Communication Bus Performance
U0002 is an OBD-II diagnostic trouble code meaning: High Speed CAN Communication Bus Performance. Common causes: open or short circuit in the can bus, bad contacts in connectors. Estimated repair cost: $6–111.
Symptoms
- Unstable operation of electronic systems
- Warning lights on the dashboard come on
- Loss of communication with some control units
- Problems starting the engine
- Infotainment system malfunctions
Causes
- Open or short circuit in the CAN bus
- Bad contacts in connectors
- Fault in one of the modules connected to the bus
- Wiring harness damage
- Interference in the electrical system
How to Fix
- Check the integrity of the CAN bus with a multimeter
- Inspect all connectors for oxidation or damage.
- Check power supply and grounding of modules
- Disable the modules one by one to identify the faulty one.
- Check the resistance on the CAN bus
Related codes
Error U0002 by Vehicle Brand
FAQ
What does the U0002 code mean?
U0002 is an OBD-II diagnostic trouble code that indicates: High Speed CAN Communication Bus Performance
What causes a U0002 error code?
The most common causes of U0002 include: Open or short circuit in the CAN bus; Bad contacts in connectors; Fault in one of the modules connected to the bus; Wiring harness damage.
How do I fix a U0002 diagnostic trouble code?
To fix U0002: Check the integrity of the CAN bus with a multimeter. Inspect all connectors for oxidation or damage.. Check power supply and grounding of modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0002?
Limited driving only, diagnose soon
How much does it cost to fix U0002?
The estimated repair cost for U0002 is $6–111. Actual cost depends on your vehicle, location, and labor rates.
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