What causes P1664 on a Ford?

Internal pump module failure Overheating from fuel starvation Voltage spike damage Wiring fault mimicking module failure Low system voltage

How do I fix P1664 on a Ford?

Verify module power and ground first Check fuel supply cools the pump adequately Rule out every external circuit fault Test with a known-good module if available Replace the module after external exclusion

P1664 Injection Pump Control Module Faulty

Q: What does P1664 mean on a Ford?

P1664 — Injection Pump Control Module Faulty. Applies to Ford diesel models with electronic injection pumps.

Category: Powertrain - Fuel/Air Metering
Severity: Check Engine Light
Applies to: Ford diesel models with electronic injection pumps

What does P1664 mean on a Ford?

P1664 — Injection Pump Control Module Faulty. This Ford-enhanced code applies to Ford diesel models with electronic injection pumps.

Common causes of P1664

Internal pump module failure
Overheating from fuel starvation
Voltage spike damage
Wiring fault mimicking module failure
Low system voltage

How to fix P1664

Verify module power and ground first
Check fuel supply cools the pump adequately
Rule out every external circuit fault
Test with a known-good module if available
Replace the module after external exclusion