Having problems with your 2003 Ford Expedition ?
Keep having coil problems with my 2003 ford expedition
Is it the back one or two on the passenger side? if so i have seen the heater hoses drip coolant onto the coils and cause them to short out if this is the case replace heater hose assembly and replace bad coil (s)
Repair Help & Product Troubleshooting for 2003 Ford Expedition
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