Question

I replaced the ECM of my 2002 Toyota Rav4 2.0L and the P1600 came up. How do I fix this?

Answer 1

P1600 ECM Batt malfunction

This is for power to the ECM even if the ignition is turn off, it is a Keep alive memory for the ECM

 

Answer 2

Hi there,

This code indicates an issue with the ECM. Here is some info for you.

P1600 TOYOTA - ECM BATT Malfunction
Read more: https://www.autocodes.com/p1600_toyota.html