Engine codes P09ac, U2584, P3400 and P0001?

So, these are codes for different systems, did they all come up at once?

The diagnostic trouble codes (DTCs) you've mentioned for your 2016 Dodge Journey cover various systems, including the transmission and engine. Let's go through each code:

P09AC - Cylinder 1 Injector Circuit Low

U2584 - Invalid Data Received from Steering Control Module

P3400 - Cylinder Deactivation System

P0001 - Fuel Volume Regulator Control Circuit/Open

We can only handle one code problem at a time, if these all came up at once let's clear the codes and then without starting the engine turn the system on and run the codes again. We are looking for the most prevalent code. Here is how to fix the P09AC - Cylinder 1 Injector Circuit Low:

I would check the electrical connector at the Cylinder 1 injector to check for damage or corrosion. If it looks okay, I would replace the injector here is how. You will need to remove the upper intake manifold. Check out the images (below). Please let us know what happens. Please start new questions for each of the codes if they come up at different times.

Okay, let's start a new question for each code, please continue with the P09AC code repair on this thread.