Engine Coolant Temperature Indicator Inoperative. Oldsmobile Silhouette Ext. 1999

For 1990-2009 cars only

Makes 🢒 Oldsmobile 🢒 1999 🢒 Silhouette Ext. 🢒 Body and Accessories 🢒 Instrument Panel, Gauges, and Console 🢒 Engine Coolant Temperature Indicator Inoperative

Step	Action	Value(s)	Yes	No
1	Check the vehicle for Diagnostic Trouble Codes (DTCs). Are any DTCs present?	--	Go to Diagnostic Trouble Code (DTC) List	Go to Step 2
2	Turn the ignition switch to the RUN position. Coolant warning indicator should be on. Start the engine, and idle. Coolant warning indicator should go off. Does the cooling warning indicator operate properly?	--	System OK	Go to DTC P1673 Engine Coolant Temperature Lamp Control Circuit

Step

Action

Value(s)

Yes

Check the vehicle for Diagnostic Trouble Codes (DTCs).

Are any DTCs present?

Go to Diagnostic Trouble Code (DTC) List

Go to Step 2

Turn the ignition switch to the RUN position. Coolant warning indicator should be on.
Start the engine, and idle. Coolant warning indicator should go off.

Does the cooling warning indicator operate properly?

System OK

Go to DTC P1673 Engine Coolant Temperature Lamp Control Circuit