This light will come on as you're starting the engine, just as a check.

If this light comes on and stays on while you are driving. It means that either your engine coolant temperature gage or your engine oil pressure gage may be showing a reading in the warning zone.

When the check gages light comes on, you will also hear a warning tone. The tone and the light will stay activated until the problem is corrected.

This light may also come on if your vehicle is equipped with the optional automatic engine shutdown system and engine shutdown has begun. See Engine Alarm and Automatic Shutdown under Starting the Diesel Engine .