Engine Coolant Temperature Gage

The engine control module (ECM)/powertrain control module (PCM) sends coolant temperature as determined by the coolant temperature sensor to the instrument panel cluster (IPC) via class 2. The IPC displays the engine coolant temperature with the gage. The engine coolant temperature gage defaults to cold (0°) or below if:

• The ECM/PCM detects a malfunction in the engine coolant temperature sensor circuit.
• The IPC detects a loss of class 2 communications with the ECM/PCM.