Code P0306

Tiny
MARKASS
  • MEMBER
  • 2005 CADILLAC SRX
  • 3.6L
  • V6
  • AUTOMATIC
  • 180,197 MILES
My car is giving me a code of p0306 a misfire in cylinder 6. I changed coil packs and plugs, I have also changed my camshaft position sensors and I was still getting the same code p0306. So I just finished doing a compression test on cylinder 6 and had 0 psi in that cylinder so I also did a compression test in cylinder 4 and had 150 psi so what do I do now?
Saturday, December 14th, 2019 AT 12:27 AM

1 Reply

Tiny
SCGRANTURISMO
  • MECHANIC
  • 4,897 POSTS
Hello,

Well that's not good at all. Next you have to determine where the compression in cylinder 6 is going. There are a few possibilities here. In no particular order the causes are a blown head gasket, worn compression piston ring, damaged piston, cracked engine block, cracked cylinder head, burnt valve, or a damaged valve that isn't seating correctly, worn valve guide, or a damaged/broken valve spring. How did this all come about? Please be as specific as you can, and we can go from there.

Thanks,
Alex
2CarPros
Was this
answer
helpful?
Yes
No
Saturday, December 14th, 2019 AT 3:07 AM

Please login or register to post a reply.

Related P0306 Content