Cel: P0308
Thread Starter
Melting Slicks
Joined: Aug 2000
Posts: 3,436
Likes: 977
From: Overland Park KS
Cel: P0308
So got a check engine light today and the code is P0308.
My Bosch code reader states that's a misfire in cylinder #8, which to be honest isn't reassuring.
To the dealer this week.
Anyone have any insights?
TIA,
Bish
My Bosch code reader states that's a misfire in cylinder #8, which to be honest isn't reassuring.
To the dealer this week.
Anyone have any insights?
TIA,
Bish
Safety Car
Joined: Aug 2005
Posts: 3,968
Likes: 867
From: Tulsa Oklahoma
I had that a couple times on my 2015. Didn't turn out to be anything but a "ghost" code. I'd just clear the code and see if it pops again.
Rick
Safety Car
Joined: Aug 2012
Posts: 3,960
Likes: 1,106
It could be as simple as a connector not properly seated so check the connection to the plug at that cylinder.
I have seen a few reports of spark plug failure lately which seems odd. Often a bad coil pack is the reason for this code although a damaged plug (plug with part of electrode missing causing far too wide of a gap) can lead to coil pack damage so if the dealer replaces the coil pack they should also replace the plug.
I have seen a few reports of spark plug failure lately which seems odd. Often a bad coil pack is the reason for this code although a damaged plug (plug with part of electrode missing causing far too wide of a gap) can lead to coil pack damage so if the dealer replaces the coil pack they should also replace the plug.
Thread Starter
Melting Slicks
Joined: Aug 2000
Posts: 3,436
Likes: 977
From: Overland Park KS
Thanks for the heads up on this guys. It was brutally hot yesterday when my son and I were running the car hard with oil/water temps really getting up there. No limp mode or obvious 'pulling' power; I was running a few gallons of 100 octane unleaded in the tank to try and avoid early detonation.
Thinking back there were a couple of times that I felt the car 'stumble/hesitate' under full throttle' perhaps that's when the 'misfire' episodes occurred. Regardless I'm not going to run it today until I get an answer from the dealer.
Bish
Thinking back there were a couple of times that I felt the car 'stumble/hesitate' under full throttle' perhaps that's when the 'misfire' episodes occurred. Regardless I'm not going to run it today until I get an answer from the dealer.
Bish
Safety Car
Joined: Aug 2012
Posts: 3,960
Likes: 1,106
A failing coil pack is often heat sensitive so I wouldn't be surprised if that is the issue. I escaped this issue with my 2008 CTS but a lot of owners didn't and the problem usually became apparent under high heat/high load conditions.
