P1799

SYMPTOM
P1799 - CALCULATED OIL TEMP IN USE

WHEN MONITORED
Whenever the engine is running. The DTC is set if any of the following conditions exist for three consecutive ignition starts: The thermistor voltage is out of range (below 0.70 volts or greater than 4.94 volts)

SET CONDITION
If continuous erratic thermistor voltage is sensed. The thermistor temperature stays below 27 °C or 80 °F for an extended period time.

POSSIBLE CAUSES
- INTERMITTENT WIRING AND CONNECTORS
- SPEED SENSOR GROUND CIRCUIT OPEN
- TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN
- TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND
- SPEED SENSOR GROUND CIRCUIT SHORT TO VOLTAGE
- TRANSMISSION TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
- TRANSMISSION TEMPERATURE SENSOR INOPERATIVE
- TCM - HI TRANSMISSION TEMPERATURE SENSOR
- TCM - LO TRANSMISSION TEMPERATURE SENSOR