Temperature Warning Indicator Light Or Temperature Gauge Inoperative (Models With CHT Sensor Only)
WARNING: This page does not describe the selected car, but rather 30 other vehicles, including the 2003 Mercury Sable, 2003 Mercury Mountaineer, 2003 Mercury Marauder, 2003 Mercury Grand Marquis, and 2003 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
Check cooling system or indicator light circuits. If engine is overheating, note that since a PCM DTC was not retrieved, PCM has not attempted to illuminate light. Check and repair cooling system as necessary. If cooling system is operating at normal operating temperature, go to TEST DL: CYLINDER HEAD TEMPERATURE SENSOR , step 40) under SYSTEM TESTS in SELF-DIAGNOSTICS - CNG, FLEX-FUEL & GASOLINE article.