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Codes P0300 P0304, P0305, P0306, misfires bank 2?

Tiny
MANN93
  • MEMBER
  • 2008 MERCEDES BENZ 300
  • 3.0L
  • V6
  • 4WD
  • AUTOMATIC
  • 116,000 MILES
Have constant p0300 p0304, p0305, p0306. Have changed MAF sensor, changed all plugs, 3 coils on bank 2 and have swapped with no luck. Ran fuel cleaner through and replaced cam sensors and magnets. Still misfires only when high revving usually 4250 rpm or higher. Can hear injectors ticking and have replaced PCV valve.
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Sunday, March 17th, 2024 AT 3:37 PM

1 Reply

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,536 POSTS
Hello,

I will be helping you today.

P0300: This is a generic code indicating a random or multiple misfire detection.

P0304: This code specifies that a misfire has been detected specifically in cylinder 4.

P0305: Similarly, this code points to a misfire in cylinder 5, with potential causes being the same as for P0304.

P0306: This code indicates a misfire in cylinder 6, again with similar potential causes.

This happens when the catalytic converter starts to clog up, or there is a problem with the intake port shut off motor. I would remove them for inspection. Here is the location so you can see what needs to be done to help fix the problem. Check out the images (below). Please upload pictures or videos in your response to the problem so we can see what's going on.
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Monday, March 18th, 2024 AT 12:00 PM

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