Diagnostic Trouble Code (DTC) Information

DTC information
998 8686 Replaced by 9511532 998 8686 Replaced By 9511532
Condition




The oil temperature sensor sends a signal to the transmission control module (TCM) which is used for functions such as temperature controlled lock-up and initiating high-temperature programs. The sensor has an NTC (negative temperature coefficient) resistor. The signal decreases in proportion to increasing oil temperature. Diagnostic trouble code (DTC) AT-142 is posted if the transmission control module (TCM) receives a signal from the oil temperature sensor corresponding to a temperature below -10 °C when the engine is started and that signal has not changed when the engine has been running for 10 minutes.

Substitute value
No substitution value

Possible source
- Open-circuit in signal cable or ground lead
- Short-circuit to supply voltage in the signal cable.
- Defective oil temperature sensor.
- Contact resistance in terminals

Fault symptom[s]
- No fault symptoms.