2005 Chevrolet Cobalt 2.2L Engine P0601 Code: Internal Control Module Memory Checksum Error
My 2005 Chevrolet Cobalt with a 2.2L engine starts up but only runs for 5 to 6 seconds before shutting off. The check engine light is on and the fault code P0601 is detected, indicating an internal control module (PCM) memory checksum error. This issue causes intermittent starting problems and may lead to complete engine shutdown after a short runtime.
Have you checked for a P0602 code as well? If not present, the problem is likely with the Powertrain Control Module (PCM), which will need to be replaced and reprogrammed.