P063D
Generator Voltage Sense Circuit A High
Same as P063A with the sense voltage above the plausible range.
Same as P063A with the sense voltage above the plausible range.
Common causes
- high
Sense line shorted to supply
One of the most commonly reported causes for this code — check this first.
Typical part cost: $90-390
- low
Pack cell imbalance approaching service threshold
Less common, but worth ruling out after the more likely causes.
Typical part cost: $90-390
See all causes + fix costs
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P063D mean?
P063D means "Generator Voltage Sense Circuit A High". It is a generic OBD-II code that points to a fault in the computer & auxiliary output controls.
What are the most common causes of P063D?
sense line shorted to supply; pack cell imbalance approaching service threshold; ground point with elevated resistance — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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