U0025
Low Speed CAN Communication Bus (-) Low
U0025 is an OBD-II diagnostic trouble code meaning: Low Speed CAN Communication Bus (-) Low. Common causes: broken or damaged can bus wires, corrosion or oxidation of contacts. Estimated repair cost: $6–56.
Symptoms
- Unstable operation of electronic systems
- Malfunction indicator light comes on
- Lost connection with some modules
- Problems starting the engine
- Dashboard malfunctions
Causes
- Broken or damaged CAN bus wires
- Corrosion or oxidation of contacts
- Fault in one of the modules connected to the bus
- Problems with module power supply
- Damage to CAN bus terminators
How to Fix
- Check the integrity of the CAN bus wires
- Clean and check all contacts and connectors
- Check power supply and grounding of modules
- Diagnose and replace the faulty module if necessary
- Check and replace CAN bus terminators if necessary
Related codes
Error U0025 by Vehicle Brand
FAQ
What does the U0025 code mean?
U0025 is an OBD-II diagnostic trouble code that indicates: Low Speed CAN Communication Bus (-) Low
What causes a U0025 error code?
The most common causes of U0025 include: Broken or damaged CAN bus wires; Corrosion or oxidation of contacts; Fault in one of the modules connected to the bus; Problems with module power supply.
How do I fix a U0025 diagnostic trouble code?
To fix U0025: Check the integrity of the CAN bus wires. Clean and check all contacts and connectors. Check power supply and grounding of modules. For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0025?
Limited driving only, diagnose soon
How much does it cost to fix U0025?
The estimated repair cost for U0025 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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