Hey everyone, I'm new here on this forum and wanted to introduce myself before I ask a question. My name is Simon, I'm from Texas and I love working on my truck and cars. I inherited a 2005 1500 Ram and I just replaced the whole front end suspension.


The CHECK ENGINE LIGHT is on since I got it and can't figure out what the cause is. I get the following error codes P0302, P0402, P0068 and P0404.


I would love to fix this and enjoy driving it a while longer!


I appreciate and thank you for your advice and opinions!!!

 

I recommend you start with the 0302, that's a misfire on cylinder 2. You don't mention if you have a 4.7 or 5.7, but examine the plug(s) from cylinder 2. Also make note when removing the plugs if they are properly torqued and not loose.
Spark plugs will tell you a lot about what is going on with the engine. There are good videos on spark plug analysis.

 

It's a 4.7. I replaced all the Spark plugs 3 months ago because I thought this was the issue. Aside from the age of the plugs, they looked decent

 

What brand plugs did you install? What type?

 

I installed NGK pro-v

 

Are those platinum, or iridium, or someotherium?

 

 

Ok, good ol' copper plugs.

Some interesting codes there...... Do you have a scanner that can read live data??

 

I used that brand for years, do you have reservations against NGK regular ol’ copper?
Erased the codes last week and took a fresh reading just now. The only code popping up is P0420

 

That code is for the cat...... Might try removing the front O2 sensor from the exhaust completely, and see if the truck runs any better.