What causes P1605 on a Ford?

Internal PCM memory fault Low battery voltage during the memory self-test Corrupted adaptation data Recent failed programming attempt Poor PCM power or ground

How do I fix P1605 on a Ford?

Load-test the battery and verify charging voltage Clear the code and see if it returns on a clean drive cycle Check PCM power and ground integrity Check for a PCM calibration update Replace the PCM if the error persists with good power

P1605 PCM Keep Alive Memory Test Error

Q: What does P1605 mean on a Ford?

P1605 — PCM Keep Alive Memory Test Error. Applies to F-150, Mustang, Explorer, Ranger.

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

What does P1605 mean on a Ford?

P1605 — PCM Keep Alive Memory Test Error. This Ford-enhanced code applies to F-150, Mustang, Explorer, Ranger.

Common causes of P1605

Internal PCM memory fault
Low battery voltage during the memory self-test
Corrupted adaptation data
Recent failed programming attempt
Poor PCM power or ground

How to fix P1605

Load-test the battery and verify charging voltage
Clear the code and see if it returns on a clean drive cycle
Check PCM power and ground integrity
Check for a PCM calibration update
Replace the PCM if the error persists with good power