What is the diagnostic code p1686 for a Dodge Neon?

The diagnostic trouble code (DTC) P1686 for a Dodge Neon indicates an issue with the "No Bus Communication" between the engine control module (ECM) and the instrument cluster. This code often signifies a potential problem with the wiring, connectors, or the PCM itself, which can lead to a loss of communication within the vehicle's systems. It’s advisable to inspect the related wiring and connectors for damage or corrosion and test the PCM for proper function.