Originally Posted by INTIMIDAT3R
Anyone have the service bulletin number?
My '12 2LS has been in the shop twice for misfires in cylinders 2 and 4.
The bulletin number is "#PIP3146D for excessive carbon on top of valves."
When they reassembled the engine they then received codes P0017 and P0016 which read, P0017 - "Crankshaft position sensor - exhaust camshaft position not plausible bank 1" and P0016 - "Crankshaft position - intake camshaft position not plausible bank 1"
That in turn led them to the bulletin, which I don't have, that says the timing chain is slack.