2003 Ford Escape XLT V6 3.0L Persistent DTC P0403 - How to Diagnose Open Ground or Wiring Issues

Model: 2003 FORD ESCAPE XLT V6 3.0 Fault Code: P0403 Posted: 2015-04-13 02:11

I've been experiencing the DTC P0403 code on my 2003 Ford Escape XLT with a 3.0L V6 engine for some time. I recently replaced both the exhaust gas solenoid and the DPFE (Differential Pressure Feedback) sensor using genuine Ford parts, but the code persists. Now I suspect an open ground or faulty wiring in the system. Can anyone provide clear, step-by-step instructions on how to check for these issues? I've tried searching online for detailed guidance, but most results are vague or outdated and don't specifically address this model year or fault code.