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 26 °C (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
- PCM - Transmission temperature sensor low
- PCM - Transmission temperature sensor high