DTC P0601, P0602, P0603, P0604, P0605, P0606, P0607, P060E, P1600, P1621, P1627, P1681, P1683, or P2610: Description
WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM). This diagnostic also addresses if the ECM is not programmed.