Code p0621-00, not running?

2012 CHEVROLET TRAVERSE
180,000 MILES • 3.6L • V6 • 2WD • AUTOMATIC
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REDBONE
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  • 105 POSTS
I try to start car, and it turns over, sounds like it hits but won't run, only code i get is p0621-00.
Sep 16, 2024 at 10:28 AM
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STRAILER
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I don't think this code will keep it from starting, can I ask if the engine sounds normal when cranking over? Can you upload a short video so I can see it?

P0621: Generator Lamp Control Circuit Malfunction

Please go over this video as well:

https://youtu.be/lXLJbuAZ4CE?si=fXfAcFXHgkthoDO0

We can do a compression test to see if the engine is hurt or not.

https://www.2carpros.com/articles/how-to-test-engine-compression

Please go over these guides and get back to us. We need more information to help you.
Sep 16, 2024 at 2:26 PM
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