Code result
P063A
Generator Voltage Sense Circuit A
Moderate severity
What it means
A general circuit fault is detected on the alternator voltage sense line A - the line over which the regulator measures battery-side voltage to set charging output.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Open in sense line
highOne of the most commonly reported causes for this code — check this first.
Pack cell imbalance approaching service threshold
lowLess common, but worth ruling out after the more likely causes.
Ground point with elevated resistance
lowLess common, but worth ruling out after the more likely causes.
Related help
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