Possible Causes
WARNING: This page is about a different car, the 2002 Nissan Pathfinder and 2002 Infiniti QX4. However, it is still accessible from the selected car via links, so may be relevant.
ECM illuminates MIL and sets DTC P0600, when ECM receives incorrect voltage from Transmission Control Module (TCM) continuously. Possible causes are:
- Communication line circuit open or shorted.
- Poor, loose, corroded or damaged terminal connections.
- Defective TCM.
- Weak battery.