P0196
DTC P0196
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (Initial Inspection and Diagnostic Overview) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (Initial Inspection and Diagnostic Overview) for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions (Initial Inspection and Diagnostic Overview) provides an overview of each diagnostic category.
DTC Descriptor
DTC P0196
- Engine Oil Temperature (EOT) Sensor Performance
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
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.
Conditions for Running the DTC
* DTCs P0101, P0102, P0111, P0112, P0113, P0116, P0117, P0118, P0128, P0197, P0198, P0500, and P2610 are not set.
* The engine is running.
* The engine coolant temperature (ECT) is between 45-95°C (113-203°F).
* The start-up ECT is between -7 and +105°C (+19.4 and +221°F).
* The calculated oil temperature is greater than 70°C (158°F).
* The intake air temperature (IAT) sensor is less than 30°C (86°F).
* The DTC runs continuously when the above enabling conditions are met.
Conditions for Setting the DTC
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).
Action Taken When the DTC Sets
DTC P0196 is a Type B DTC.
Conditions for Clearing the MIL/DTC
DTC P0196 is a Type B DTC.
Diagnostic Aids
* An IAT sensor that is skewed lower at various ambient temperatures, due to more resistance than is normal, can widen the spread between the two sensors and cause this DTC to set. Measure and record the resistance of the IAT sensor and EOT sensor at various ambient temperatures, and then compare those measurements to the Temperature vs. Resistance Table. Refer to Temperature Versus Resistance (Temperature Versus Resistance) .
* Inspect the IAT and EOT sensors terminals, for corrosion or a poor connection.
Reference Information
Schematic Reference
* Engine Controls Schematics (Electrical Diagrams)
* Instrument Cluster Schematics (Instrument Cluster Schematics)
Connector End View Reference
Component Connector End Views (Connector Views)
Electrical Information Reference
* Circuit Testing (Component Tests and General Diagnostics)
* Connector Repairs (Component Tests and General Diagnostics)
* Testing for Intermittent Conditions and Poor Connections (Component Tests and General Diagnostics)
* Wiring Repairs (Component Tests and General Diagnostics)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (Diagnostic Trouble Code Descriptions)
Scan Tool Reference
Control Module References (Programming and Relearning) for scan tool information
Circuit/System Verification
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 (Diagnostic Trouble Code Descriptions) .
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.
Circuit/System Testing
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.
Component Testing
Compare the resistance of the IAT sensor to the temperature vs resistance table.
Repair Instructions
Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.
* Engine Oil Level Sensor and/or Switch Replacement (Service and Repair)
* Mass Airflow Sensor/Intake Air Temperature Sensor Replacement (Service and Repair)
* Control Module References (Programming and Relearning) for ECM replacement, setup, and programming