× 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

P1646 Diagnostic Trouble Code Discussion for March 2010

Hydraulic Cooling Fan Control Circuit Low

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 P1646
Help Request Posted
1999 Cadillac DeVille 4.6L MIL Lamp on VIN: 1G6KE54Y1X
P1646: EVAP Vent Solenoid Control Circuit Malfunction. Vehicle has Code P1646 Control Vent Solenoid Circuit Problem. When Vehicle first came in we did smoke test and found fuel cap cracked. Replaced and customer drove for several weeks and about 200 miles before light came on again. Smoke test again and ran test o...
March 29, 2010