P3442 & P0306 codes?

Tiny
ARRICK70
  • MEMBER
  • 2012 RAM 1500
  • V8
  • 4WD
  • AUTOMATIC
  • 221,650 MILES
This is on a 2012 5.7 hemi
Reman engine about 12k miles. Replaced the #6 injector. Have replaced coils, spark plugs, MDS solenoids & jumper wire. Replaced VVT solenoid. Cam & crank sensors. Has a rebuilt PCM put in in August 2025. Ran great up until a cold spell we had in Indiana before Xmas. Then lights came on. Sometimes I can clear codes but still runs rough code returns at various times.
Thursday, January 22nd, 2026 AT 11:23 AM

6 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,656 POSTS
Hello,

The first thing I would do is a compression test on #6, this video will show you how, you can rent a gauge set form the auto parts store for free to help with the test.

https://www.youtube.com/watch?v=KOxIm1F8AW0&pp=0gcJCYcKAYcqIYzv

P3442 - Cylinder 6 Deactivation/Intake Valve Control Circuit Performance
P0306 - Cylinder 6 Misfire

This test will tell us which way to go for the repairs. Let us know how it goes, Ken
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Friday, January 23rd, 2026 AT 11:36 AM
Tiny
ARRICK70
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I did that on 2, 4, 6, 8 all came out the same.
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Friday, January 23rd, 2026 AT 12:10 PM
Tiny
KEN L
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Okay, then the cylinder deactivation control solenoid has gone out. You will need to remove the intake manifold here is how to do the job which you will need a special tool for.

Install the Remover, MDS Solenoid 2028200090 (1) and securely tighten the retaining screw (2). Lightly tap on the top of the MDS solenoid removal tool with a rubber mallet or equivalent to break the seal. Pull vertically and remove the MDS solenoid(s). Clear the codes once completed. Check out the images (below). Let us know how it goes
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Saturday, January 24th, 2026 AT 10:38 AM
Tiny
ARRICK70
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The first thing I did was replace all the solenoids & jumper/harness. I've replaced the VVT solenoid as well.
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Sunday, January 25th, 2026 AT 6:14 AM
Tiny
KEN L
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So to confirm you replace the "cylinder deactivation control solenoid"?
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Sunday, January 25th, 2026 AT 8:36 AM
Tiny
ARRICK70
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Yes, all 4 of them.
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Sunday, January 25th, 2026 AT 10:40 AM

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