P018D Trouble Code

[Daveishere63]

I have a 2015 ram with it at check engine light on
The original code was P018C
Garage said they replace the fuel pump and pressure sensor and harness
I Truck now has a P018D code
Any help would be appreciated

 

[Treburkulosis]

You would get a better response in the 4th gen section. @crash68

 

[Daveishere63]

Not sure what you are referring
More information?

 

[crash68]

@Treburkulosis it's moved, when a post is in the wrong section you can hit the report button, that way any of the forum staff will see it.

Not sure what you are referring
More information?

He's referring to the section you posted in, the forum has different sections depending on what your posting about. I already moved the post to the correct section.
As for your error code it sounds more like fuel pressure sensor issue which I believe is on the fuel rail on top of the engine.

 

[csuder99]

Both codes are *circuit* codes relating to the fuel pressure sensor. While a circuit code is sometimes triggered by a defective sensor just replacing the sensor and crossing the fingers that it fixes it is often futile. I don't know the layout of the wiring harness but I doubt the shop replaced the whole wiring between the sensor and the PCM.

The sensor is a simple 3 wire design: 5V, ground and a signal wire. The proper way to diagnose the problem would be to make sure the 5V and ground are stable (oscilloscope would be ideal) and then measure the signal voltage. Then do the same at the PCM pins and compare. Unfortunately most shops just hook up the code reader and unload the parts cannon.