The engine oil temperature (EOT) sensor is a variable resistor that measures the temperature of the engine oil. The engine control module (ECM) supplies 5 volts on the EOT signal circuit, and a ground to the low reference circuit. Monitoring the engine oil temperature is necessary for optimal control of the cam phasers. The oil temperature is monitored from dual function oil level switch and temperature sensor located in the oil pan.

Cold Start Fail Test

At start-up, after a 10 hour engine soak time, the EOT is greater than 30°C (54°F) higher or lower than the ECT sensor, and the difference between start-up temperature for the ECT and IAT is less than 16°C (29°F).

OR

The difference between start-up EOT and the start-up ECT is greater than 16°C (29°F) or the difference between the start-up EOT and the start-up IAT is greater than 16°C (29°F).

Continuous Fail Test

The difference between the calculated oil temperature and the actual oil temperature is greater than 40°C (72°F).

DTC P0196 is a Type B DTC.

DTC P0196 is a Type B DTC.

Schematic Reference

Connector End View Reference

Component Connector End Views

Electrical Information Reference

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

1. Verify that DTCs P0112, P0113, P0116, P0117, P0118, P0197, or P0198 are not set.

⇒	If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle .

2. Ignition ON, observe the scan tool Engine Oil Temperature Calculated and the Engine Oil Temperature Sensor parameters. The readings should be within 30°C (54°F) of each other.

Important: Perform the following verification procedure only if the ignition has been OFF for 10 hours or more.

3. Ignition ON, observe the scan tool IAT Sensor, ECT Sensor, and Engine Oil Temperature Sensor parameters. The readings should be within 15°C (27°F) of each other and also the ambient temperature.
4. Operate the vehicle within the Conditions for Running the DTC to verify that the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

1. Ignition OFF, disconnect the harness connector at the EOT sensor.
2. Ignition OFF for 90 seconds, test for less than 5 ohms of resistance between the low reference circuit terminal C and ground.

⇒	If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the ECM.

3. Ignition ON, verify the scan tool EOT Sensor parameter is colder than -39°C (-38°F).

⇒	If greater than the specified range, test the signal circuit terminal B for a short to ground. If the circuit tests normal, replace the ECM.

Important: If the 3A fuse in the jumper wire opens, the signal circuit s shorted to a voltage and the sensor may be damaged.

4. Install a 3A fused jumper wire between the signal circuit terminal B and the low reference circuit terminal C. verify the scan tool EOT Sensor parameter is warmer than 149°C (300°F).

⇒	If less than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.

5. Ignition OFF, disconnect the harness connectors at the ECM.
6. Test for infinite of resistance between the oil temperature sensor signal circuit terminal B and the oil level switch signal circuit terminal A.

⇒	If less than the specified range, repair the short circuit between the oil temperature sensor signal circuit and the oil level switch signal circuit.

7. If all circuits test normal, replace the engine oil level sensor and/or switch assembly.

Compare the resistance of the IAT sensor to the temperature vs resistance table.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.