P0341 - After Engine Start, Camshaft Position Slow Event Based Test
WARNING: This page is about a different car, the 2010 Pontiac G5 and 2010 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
The ECM detects the incorrect number of camshaft position sensor pulses in 2,000 revolutions of the crankshaft, which is usually within 4 minutes.