Code result
U3512
High Voltage System Interlock Circuit B Performance
High severity
What it means
HVIL loop B is electrically OK but timing/pattern does not match expected behavior — possibly intermittent contact in a connector.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
Intermittent contact in HV connector
highOne of the most commonly reported causes for this code — check this first.
Gateway module routing CAN messages incorrectly
lowLess common, but worth ruling out after the more likely causes.
CAN terminating resistor (120 Ω) drifted out of spec
lowLess common, but worth ruling out after the more likely causes.
Related help
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