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2005 LINCOLN LS
3.9L V8•RWD•AUTOMATIC•gas
1 active safety recall on this vehicle — view recalls
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Repairs0Labor478Torque3309Fluid8DTC1041Battery1Maintenance0Recalls1
P1746high severityPowertrain

Electronic Pressure Control Solenoid Open Circuit

on 2005 Lincoln LS 3.9L V8 · RWD

What this code means

The Electronic Pressure Control (EPC) solenoid has an open circuit. The EPC solenoid regulates hydraulic line pressure in the transmission. Without proper EPC operation, transmission shifting is severely affected.

Symptoms

  • Check Engine Light
  • Harsh or erratic shifting
  • Transmission slipping
  • Limp mode (stuck in one gear)
  • Transmission overheating

Common causes

  • Faulty EPC solenoid
  • Wiring open to EPC solenoid
  • Corroded EPC solenoid connector
  • Damaged PCM/TCM driver circuit

Diagnostic steps

  1. Test EPC solenoid resistance
  2. Inspect EPC solenoid wiring and connector
  3. Check for corroded pins at transmission connector
  4. Monitor EPC pressure on scan tool

Repair notes

Replace EPC solenoid. Repair wiring. May require transmission pan removal.

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