P1651 Power Steering Pressure Switch Input Malfunction
What does P1651 mean on a Ford?
P1651 — Power Steering Pressure Switch Input Malfunction. This Ford-enhanced code applies to F-150, Mustang, Ranger, Taurus with hydraulic steering.
Common causes of P1651
- Failed pressure switch with erratic output
- Fluid intrusion into the switch connector
- Wiring fault in the switch circuit
- Air in the power steering system causing pressure spikes
- PCM input fault
How to fix P1651
- Bleed air from the power steering system first
- Inspect the switch connector for fluid intrusion
- Watch switch state on a scanner through full lock turns
- Check fluid condition and level
- Replace the switch if its signal stays erratic