P0195 Malfunction in the electrical circuit of the engine oil temperature sensor

P0195 – OBD-II Trouble Code Technical Description

Trouble code P0195 indicates a malfunction in the engine oil temperature sensor circuit.

What does the fault code mean P0195?

Trouble code P0195 means that the engine control module (PCM) has detected a malfunction in one of the engine oil temperature control circuits. Before diagnosing this error, it is recommended to carefully check the vehicle's engine cooling system.

Possible reasons

Some possible reasons for the P0195 trouble code:

• Defective engine oil temperature sensor.
• The engine oil temperature sensor wiring or connectors are open, shorted, or damaged.
• There is a malfunction in the electrical circuit between the engine oil temperature sensor and the engine control module (PCM).
• Problems with the engine control module (PCM) itself, causing the oil temperature sensor to erroneously read data.
• Insufficient engine oil level, which may result in incorrect temperature reading.

What are the symptoms of a fault code? P0195?

Symptoms when trouble code P0195 is present may include the following:

• Check Engine Light: When a P0195 code appears, the Check Engine light may come on on your vehicle's dashboard, indicating there is a problem with the engine management system.
• Unstable engine performance: The engine may experience instability or rough operation due to incorrect engine oil temperature readings.
• Reduced power: The vehicle may experience loss of power due to improper operation of the engine management system.
• Cooling system malfunction: If the cause of the error is due to insufficient oil level or other problems in the cooling system, this may also lead to elevated engine temperatures or other cooling problems.

How to diagnose a fault code P0195?

To diagnose DTC P0195, follow these guidelines:

1. Check the oil level: Make sure the engine oil level is within the recommended range. Low oil level can cause the oil temperature sensor to malfunction.
2. Check the condition of the oil temperature sensor: Check the condition of the oil temperature sensor for damage or corrosion. Make sure connections are not oxidized or corroded.
3. Check wiring and connections: Check the wiring and connections between the oil temperature sensor and the engine control module (PCM). Make sure the connections are secure and show no signs of damage.
4. Diagnostics using a scanner: Use the diagnostic scanner to read additional information about the P0195 code. This may include reading live data to verify the oil temperature gauge is reading correctly.
5. Check the cooling system: Check the condition of the engine cooling system, as cooling problems may cause the oil temperature sensor to not operate correctly. Make sure the cooling system is working properly and that the engine is not overheating.

Diagnostic errors

The P0195 trouble code indicates problems with the engine oil temperature sensor. Here are some common errors that may occur when diagnosing this trouble code:

1. Incorrect data reading: Sometimes the fuel pressure sensor may give incorrect or incomplete data due to a malfunction of the sensor itself or a problem with its connection. This may lead to erroneous diagnostic conclusions.
2. Insufficient system check: Some errors may occur due to incomplete inspection of the entire fuel system, including the fuel pump, fuel filters and fuel pressure regulator.
3. Ignoring other possible problems: Diagnosing the P0195 code may overlook other potential problems in the fuel injection system, such as leaks or problems in the fuel lines.
4. Insufficient attention to environmental factors: Sometimes environmental factors such as tire pressure, engine and fuel temperature can affect the performance of the engine oil temperature sensor, and should also be taken into account when diagnosing.
5. Incorrect interpretation of test results: Some diagnostic techniques may allow for misinterpretation of test results, which may lead to incorrect conclusions about the health of the system.

How serious is the fault code? P0195?

Trouble code P0195 is not usually considered serious because it rarely causes serious problems with the vehicle's drivability. However, if this problem is ignored for a long time, it can damage the engine. Therefore, it is recommended that you contact a qualified technician as soon as possible to diagnose and repair the error as soon as the P0195 code appears.

What repair will help eliminate the code? P0195?

Below are suggestions for troubleshooting and fixing error code P0195:

1. Diagnostics using an OBD-II scanner: Retrieve data and stored error codes using an OBD-II scanner.
2. Clearing codes and rechecking: Clear the error codes and see if the P0195 error code appears again.
3. Checking the level and condition of the engine oil: Check the level and condition of the engine oil. If necessary, replace the oil along with the filter.
4. Checking the engine oil temperature sensor and wiring: Inspect the engine oil temperature sensor and associated wiring.
5. Checking the sensor with a multimeter and replacing it: Use a digital multimeter to test the sensor. Replace it if necessary.
6. Assessment of engine mechanical wear: Pay attention to mechanical wear on the engine. Physically check the oil temperature using a non-contact thermometer.

It is recommended that you perform these steps under the guidance of a qualified technician or mechanic to more accurately diagnose and repair the problem.

How to Diagnose and Fix P0195 Engine Code - OBD II Trouble Code Explain

P0195 – Brand-specific information

Trouble code P0195 refers to problems with the engine oil temperature sensor and can be found in various makes of vehicles. Here are some of them:

1. Ford: P0195 – Engine oil temperature sensor is faulty.
2. Chevrolet / GMC: P0195 – Engine oil temperature sensor fails.
3. Toyota: P0195 – Low input signal from the engine oil temperature sensor.
4. Honda/Acura: P0195 – Incorrect engine oil temperature sensor circuit.
5. Nissan/Infiniti: P0195 – Engine oil temperature sensor input high.
6. Volkswagen/Audi: P0195 – Engine oil temperature sensor is faulty.
7. BMW: P0195 – The engine oil temperature sensor has an incorrect signal.

Specification for a specific vehicle make and model may require additional information or consultation with the repair manual or service manual for the specific vehicle.