P0623
Generator Lamp Control Circuit
Generic generator warning lamp control circuit fault, often used where the lamp terminal designation is not L or where multiple lamps share a single output.
Generic generator warning lamp control circuit fault, often used where the lamp terminal designation is not L or where multiple lamps share a single output.
Common causes
- high
Lamp circuit open or shorted
One of the most commonly reported causes for this code — check this first.
Typical part cost: $90-550
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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 P0623 mean?
P0623 means "Generator Lamp Control Circuit". 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 P0623?
lamp circuit open or shorted — 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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