Code result
P0B71
Hybrid/EV Battery Voltage Sense K Circuit Intermittent/Erratic
High severity
What it means
The BMS detects a circuit intermittent/erratic fault on voltage sense channel K of the high-voltage battery. Cell-group voltage measurement is unreliable on this channel.
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
Sense connector not seated
highOne of the most commonly reported causes for this code — check this first.
Noisy ground reference
mediumA plausible cause — test and verify before replacing parts.
Connector with intermittent contact under vibration
lowLess common, but worth ruling out after the more likely causes.
Related help
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