Code 14 - Coolant Sensor Shorted

Code 14 means the ECM has seen low resistance of the coolant sensor circuit as high engine temperature, or low voltage at ECM term. "3," for a time longer than specified.

NOTE: The following step numbers refer to the numbers in the accompanying flow chart(s).

This test determines whether fault is in sensor or circuit. Normal circuit voltage is about 5 volts.
NOTE: Coolant sensor IS NOT connected during this test.
Checks for ground between ECM and coolant sensor. Test light to battery positive will be "OFF" in an ungrounded circuit.

Fig 1: Code 14, Coolant Sensor Shorted

Fig 2: Code 14, Coolant Sensor Shorted