U0098

Vehicle Communication Bus H (-) Low

Severity

🔴 High

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–56 (est.)

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

U0100 U0121 U0140