P2678 – Coolant Degassing Valve Control Circuit/Open

P2678 Possible Symptoms

Engine Light ON (or Service Engine Soon Warning Light)

P2678 Possible Causes

Faulty Coolant Degassing Valve,Coolant Degassing Valve harness is open or shorted,Coolant Degassing Valve circuit poor electrical connection

P2678 Description

The Powertrain Control Module (PCM) monitors the Coolant Degassing Valve Control Circuit. The PCM sets the OBDII code when the Coolant Degassing Valve Control Circuit is out of factory specifications.