× Auto Repair Pros Member Benefits TechHelp Knowledge Base Forums Resources My iATN Marketplace Chat Pricing About Us Join Industry Sponsors Video Members Only Repair Shops Auto Pro Careers Auto Pro Reviews
Join Now
International Automotive Technicians Network

P0621 Diagnostic Trouble Code Discussion for March 2007

Generator L-Terminal Circuit Malfunction

Note: This is a professional automotive technician's resource.
Vehicle Owners: If you are seeking an automotive repair professional to service your vehicle, visit the iATN Repair Shop Finder.

Trouble Ticket Help Requests for DTC P0621
Help Request Posted
2001 Chevrolet S10 2.2L No Start, Poor Idle Quality VIN: 1GCSS14591
P0621: Generator 'L' Terminal Circuit Malfunction. This vechicle came to me with a hard start & poor idle problem. The owner claimed it would crank over but not fire. In addition, during cranking, at times it would kick back like a timing problem. If it did start it would idle poorly and sometimes stall. I...
March 20, 2007