Code 14: Coolant Temp Sensor Signal Volt Low: Notes

WARNING: This page is about a different car, the 1990 Pontiac Firebird and 1990 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

Coolant temperature is one input the ECM uses to control fuel delivery, spark timing, idle speed, converter clutch, canister purge, air management (man. trans.), EGR and cooling fan.

NOTE: Test numbers refer to test numbers on diagnostic chart.

Code 14 will set if signal voltage indicates high coolant temperature for 3-20 seconds.
This test determines if circuit No. 410 is shorted to ground which will cause the conditions for Code 14.