Code p0621-00, not running?

2012 CHEVROLET TRAVERSE
180,000 MILES • 3.6L • V6 • 2WD • AUTOMATIC
Avatar
REDBONE
  • MEMBER
  • 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
Advertisement
Avatar
STRAILER
  • CAR REPAIR CONTRIBUTOR
  • 54,338 POSTS
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
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.