Code 14, Coolant Temp Sens SGNL VLTGE Low (Hi Temp Indicated): Notes

Code will set if PCM sees an extremely high temperature signal (low voltage). Most likely causes of code are: sensor signal circuit shorted to ground, faulty coolant temperature sensor or faulty PCM.

NOTE: This chart assumes engine cooling system is functioning properly (not overheating). Test numbers refer to numbers on diagnostic chart.

This checks if conditions for code still exist.
This tests for grounded sensor signal line between control module and coolant sensor.