U0098
Vehicle Communication Bus H (-) Low
U0098 is an OBD-II diagnostic trouble code meaning: Vehicle Communication Bus H (-) Low. Common causes: open or short circuit in the can-h wire, oxidation of contacts in can bus connectors. Estimated repair cost: $6–56.
Symptoms
- Unstable operation of the dashboard
- Problems starting the engine
- Failure of individual vehicle systems
- Occurrence of other CAN bus errors
- Flashing warning lights on the instrument panel
Causes
- Open or short circuit in the CAN-H wire
- Oxidation of contacts in CAN bus connectors
- Fault in one of the modules connected to the bus
- Damage to CAN bus terminators
- Problems with module power supply
How to Fix
- Check the integrity of the CAN-H wires
- Inspect and clean the contacts in the connectors
- Check the resistance on the CAN bus (should be about 60 ohms)
- Disable the modules one by one to find the faulty one.
- Check power and ground of modules
Related codes
Error U0098 by Vehicle Brand
FAQ
What does the U0098 code mean?
U0098 is an OBD-II diagnostic trouble code that indicates: Vehicle Communication Bus H (-) Low
What causes a U0098 error code?
The most common causes of U0098 include: Open or short circuit in the CAN-H wire; Oxidation of contacts in CAN bus connectors; Fault in one of the modules connected to the bus; Damage to CAN bus terminators.
How do I fix a U0098 diagnostic trouble code?
To fix U0098: Check the integrity of the CAN-H wires. Inspect and clean the contacts in the connectors. Check the resistance on the CAN bus (should be about 60 ohms). For a complete diagnosis, use an OBD-II scanner.
Is it safe to drive with U0098?
Yes, but get it checked soon
How much does it cost to fix U0098?
The estimated repair cost for U0098 is $6–56. Actual cost depends on your vehicle, location, and labor rates.
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