Ray just for laffs replace the meter panel with a sister unit if one is available. Install the meter panel of this truck onto another and see if problem follows. If engine is running good and is giving no E codes then i highly doubt the ECM (engine control module) is the problem. This unit has what is known as a canbus system and the P codes are reference to VCM (vehicle control module). The MP ( meter panel). VCM and ECM are linked by wire. The circle represents something as simple as clogged air filter,low coolant in radiator ect. Do you have access to an operators handbook on this unit? If so the circle will be displayed below or above those little icons that surrounds the hour meter spyglass. Sounds like you have a possible issue with the meter panel. Can you give me a serial number or chassis number?
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