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Engine threw crankshaft pulley, nothing left to attach new one too. Dealer checked out stated it needed crankshaft sprocket, pulley, and recommended timing belt as it would be off along with serp belt that was gone. Since picking up after their repair it set codes P0340,P0341, P0365 & P0366, they refused to check timing or go back in as they insisted it had engine sludge and  cause of current issue. It is getting no signal from Camshaft @ bank 1 or 2, has 5 volt reference in harness to sensor and 12 volt ground. Changed both cam sensors along with both variable cam timing solenoids. Also checked air gap between cam & sensor and camshaft end looks in tact. At a cold start it will run fine until you shut off, then it will pop light have elongated crank, engine clatter/knock stall for about 3 times. Then I'm assuming it compensates with crank signal and will run fine until next shutoff mil stays on. With scanner codes 340 & 341 are permanent and do not clear other 2 pending. Not sure where to get tools to attempt to check timing or reinstall belt if needed. I'm at the point of replacing with used engine or trading in.... Any help would be appreciated....65
Vehicle: 2011,Chevy,Cruz 1.8 liter eco

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P0340 Intake camshaft position sensor circuit

P0341 Intake camshaft position performance

You have 2 code stating the performance of the camshaft sensor , what this means is there is a camshaft signal but the performance is off. This is mechanical, The codes that are set says it all. By the way this is not a easy timing belt job, there a lot of locking device that has to be used to correctly install the timing belt.

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