|Coolant Temperature Sensors|
What they do
Measure engine coolant temperature and signals the ECU to adjust the fuel mixture.
Poor performance and economy, hard starting or misfire. Temperature gauge reads erratically or not at all. "Check Engine" light illuminated.
Maintenance / Service
Inspect every 12,000 - 15,000 miles. Check sensor for proper resistance values. Coolant, particuarly old coolant, may cause sensor malfunction.
NOTE: Incorrect coolant level may cause false readings.