2008 Ford Explorer Not Starting with P0685 Fault Code - How to Diagnose and Fix
Hello everyone, I'm experiencing a starting issue with my 2008 Ford Explorer that has triggered fault code P0685. The vehicle won't start despite normal battery voltage and no visible signs of electrical problems. I'd appreciate any advice on how to properly diagnose and resolve this issue. Thanks in advance for your help.
Start by checking the underhood fuse box—verify fuse F7 (40A) is intact and properly seated. Also, test the Powertrain Control Module (PCM) relay; try swapping it with a known good relay to see if the issue resolves. Make sure there's no remote starter installed, as this can interfere with starting systems. Always use a test light or digital multimeter (DVOM) to confirm continuity—don't just visually inspect the components.