99 gmc Yukon codes P0305 and P1345

1999 GMC YUKON

219,991 MILES • 5.7L • V8 • 2WD • AUTOMATIC

QARMSTEAD

MEMBER
2 POSTS
FOLLOW

I'm getting these codes p0305 and p1345 twice on the actron meter reading can someone please tell me what is the problem and how can I fix
Thanks.
in advance
Amanda
And I removed the sparkplug and had a Little oil is this bad?

Feb 11, 2016 at 7:37 AM

JOHNNYT73

CERTIFIED EXPERT
924 POSTS

P0305 = misfire cylinder #5
P1345 = crank position/cam position correlation.

First find out what is causing your misfire. Check that you speak at the wire where it goes to the plug. If you do then try a new plug.

The P1345 can be set of the distributor hold down bolt is loose, or if the crank sensor is bad. I think timing has to be set with a scan tool on these trucks. Try correcting the misfire to see if both codes go away.

Feb 11, 2016 at 8:48 AM

QARMSTEAD

MEMBER
2 POSTS

Ok thank you I will try this

Feb 11, 2016 at 9:04 AM