[Bobo57]

Hi all,
05 SSR automatic throwing a P0308 code. Hoping it’s the most simple thing, plugs. Anybody have experience with this code? What did you finally find as the assignable cause?
Thanks gang,
Bob

:ssr:yellow::blur:

 

[Cash]

Google brings up lots - just google "P0308 code"
Indicates PCM issue to do with cylinder #8

https://www.obd-codes.com/p0308

I expect this has come up on the forum before as well

 

[VI Ken]

Just looked up P0308. Code points to a misfiring cylinder number 8.

Seems to me that potential causes could be anything from plug or ignition coil failure to a bad fuel injector.

No direct experience personally.

 

[Bobo57]

Causes

Read that, looking to address the easiest issue first plugs. Then on down the list.

Even though I don’t have many miles on it I had the same code on another car and it was bad plugs.......

B

 

[Texasbaehr]

I have seen this a few times in a 5.3, may be the same with the 6.0. In two cases it was a cracked insulator on the #8 plug. Why always the #8, I have no idea. both were Chevy trucks with over 120K miles and may have had the original plugs.
Pull the plug and check it before diving any deeper.