Conditions for Running the DTC: Notes
WARNING: This page is about a different car, the 2007 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
P0601, P0603
- The ignition switch is in Run or Crank.
- The system voltage is more than 5 volts.
P0602
- The ignition switch is in Run or Crank.
- The controller is identified as a service replacement ECM.