What causes P1642 on a Ford?

Monitor wire shorted to voltage Failed monitor sensor Pump running at full duty from a fault Corroded connector PCM input fault

How do I fix P1642 on a Ford?

Check actual pump duty cycle on a scanner Inspect monitor wiring for shorts Test the monitor sensor Verify pump control is normal Repair wiring or replace the sensor

P1642 Fuel Pump Monitor Circuit High Input

Q: What does P1642 mean on a Ford?

P1642 — Fuel Pump Monitor Circuit High Input. Applies to F-150, Explorer, Expedition with monitored fuel pumps.

Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: F-150, Explorer, Expedition with monitored fuel pumps

What does P1642 mean on a Ford?

P1642 — Fuel Pump Monitor Circuit High Input. This Ford-enhanced code applies to F-150, Explorer, Expedition with monitored fuel pumps.

Common causes of P1642

Monitor wire shorted to voltage
Failed monitor sensor
Pump running at full duty from a fault
Corroded connector
PCM input fault

How to fix P1642

Check actual pump duty cycle on a scanner
Inspect monitor wiring for shorts
Test the monitor sensor
Verify pump control is normal
Repair wiring or replace the sensor