What causes P1633 on a Ford?

Weak battery unable to hold memory voltage Corroded battery terminals or cables Blown or corroded KAM fuse Parasitic drain pulling the battery down overnight Failing alternator undercharging

How do I fix P1633 on a Ford?

Load-test the battery and replace it if weak Clean battery terminals and cable ends Check the KAM fuse and holder for corrosion Test for parasitic drain if the battery keeps dying Verify charging voltage with all loads on

P1633 Keep Alive Power Voltage Too Low

Q: What does P1633 mean on a Ford?

P1633 — Keep Alive Power Voltage Too Low. Applies to F-150, Mustang, Explorer, Focus.

Category: Powertrain - Computer and Auxiliary Controls
Severity: Check Engine Light
Applies to: F-150, Mustang, Explorer, Focus

What does P1633 mean on a Ford?

P1633 — Keep Alive Power Voltage Too Low. This Ford-enhanced code applies to F-150, Mustang, Explorer, Focus.

Common causes of P1633

Weak battery unable to hold memory voltage
Corroded battery terminals or cables
Blown or corroded KAM fuse
Parasitic drain pulling the battery down overnight
Failing alternator undercharging

How to fix P1633

Load-test the battery and replace it if weak
Clean battery terminals and cable ends
Check the KAM fuse and holder for corrosion
Test for parasitic drain if the battery keeps dying
Verify charging voltage with all loads on