Code P0201 and runs rough

ALMA M. PIERCE

MEMBER
1998 DODGE DAKOTA
5.2L
V8
2WD
218,000 MILES

I get this code now and the truck runs rough feels like a misfire. The wiring was fixed so it’s not that. The injector number one had a damaged o-ring we replaced that and also cleaned all the injectors and put back. Still same code same problem and running rough. What else can it be? Should we replace the injector itself or change plugs and see what happens?

4 Replies

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello,

Direct Trouble Code (DTC) p0301 is a code for a misfire in cylinder number one of your vehicle's engine. The first thing I would do would be to change the spark plugs in the engine.I have included in the diagrams down below the proper gap to set your spark plugs for. I have also included a link below for you to go to below:

https://www.2carpros.com/articles/how-to-change-spark-plugs

Please go through this guide and get back to us with how everything turns out.

Thanks,
Alex
2CarPros

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Thursday, June 6th, 2019 AT 10:07 PM

ALMA M. PIERCE

MEMBER
2 POSTS

Thanks for your reply, which sounds like it would make sense if that were the code. Except it never threw a p0301. It’s p0201. Which I understand as an injector circuit malfunction in cylinder one. We are messing with it trying to clean it and see if it will help but so far it keep coming back the same. Going to be changing the plugs regardless so thank you for the helpful links.

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Thursday, June 6th, 2019 AT 11:15 PM

SCGRANTURISMO

MECHANIC
4,897 POSTS

Hello again,

I'm sorry about that. When you said misfire in cylinder one I automatically went to DTC P0301, which is misfire in number one cylinder. I have included the factory diagnostic troubleshooting guide for DTC P0201 in the diagrams down below. Please go through this guide and get back to us with what you are able to find out.

Thanks,
Alex
2CarPros

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Friday, June 7th, 2019 AT 9:37 AM

KEN L

MASTER CERTIFIED MECHANIC
43,110 POSTS

This guide will walk you through the steps of testing the injector to confirm the failure:

https://www.2carpros.com/articles/how-to-test-a-fuel-injector

Please let us know.

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Friday, June 7th, 2019 AT 7:37 PM