Intermittent check powertrain p0300

[SSSoooo]

VZ ute 3.6L 2006 with only 71Ks

Car runs good and randomly pops up with check powertrain on dash. And once that comes on the car misfires on 1,3,5 (same bank)

Turn car off and back on itll run great for a while then repeats randomly.

Have scanned and code p0300 (random misfire or multiple misfire) aswell as 301 303 305 usually 2 at a time

Anyone fixed this?

 

[krusing]

Either
Loose/faulty ground connections, drivers & passengers side,
Being its sounds like a common denominator on the Drivers side for Cyl # 1, 3 & 5
Check the multi pin plug at the back, under the manifold,
and/or
Plugs [Pull the plugs out and check the condition of them, clean them up and re-gap them to 1.2mm +/-.2mm]
[hint: write the Cyl # on them with a texta] maybe swap the LHS plugs with the RHS when re-fitting them,
[Yes its a pain to remove them twice, but it possibly could save you some $'s]

Refit them and see if it appears again, if it does, Plugs could be failing under compression/combustion,
whereas at 71,000 k's, plugs may need replacing, also depends on the fuel is being used [ie: E10]

Maybe the Coils, but shouldn't think so, [assuming they are OEM coils]

But there are a few things to self-check first before loading the parts cannon.