Question

How do I repair a Toyota with engine codes p1603 and p1605? What do the codes mean?

Answer 1

When you get this code, the ECM (engine control module) has failed when its running is running on a set of substituted values, there is no fuel control at all, and the solution is an ECM replacement.

Answer 2

HI there

This is really an informational code. Here is some info on the code for you.

P1603 TOYOTA - Engine Stall History
Read more: https://www.autocodes.com/p1603_toyota.html

P1605 Toyota Code - Engine Rough Idling
Read more: https://www.autocodes.com/p1605_toyota.html