Skip the auto shop - Our mechanics make house calls

P0195 OBD-II Trouble Code: Engine Oil Temperature (EOT) Sensor Malfunction

Check Engine Light

P0195 code definition

Engine Oil Temperature (EOT) sensor malfunction

What the P0195 code means

The intended purpose of this code is to indicate if there is a problem with one of the circuits that monitor the engine oil temperature. However, if there are cooling system problems, the diagnostics designed to confirm the proper operation of the EOT can interpret the results as a failure in the EOT system. For this reason, cooling system issues need to be addressed first.

What causes the P0195 code?

  • Faulty engine oil temperature sensor
  • Problems with the EOT circuit
  • Faulty powertrain control module (PCM)
  • Cooling system malfunctions

What are the symptoms of the P0195 code?

The only symptom is a Check Engine Light. The EOT system is there to detect other problems with the vehicle. If the circuits of the EOT system has problems, it will be unable to monitor the oil temperature.

How does a mechanic diagnose the P0195 code?

A scan tool should be used to watch the sensor data, but most often, a resistance check is performed on the sensor and is the final test performed before determining the source of the P0195 code.

Common mistakes when diagnosing the P0195 code

  • A technician chooses to replace the sensor without checking the wiring going to and from the EOT sensor.

  • Failing to check the reference voltage the PCM provides to the sensor.

  • Not identifying problems with the cooling system that can mimic the data that sets this code.

How serious is the P0195 code?

The P0195 code by itself is not serious. It will not leave an owner stranded on the side of the road. However, if the system is left unrepaired, it is possible that severe engine damage can occur if the EOT system is unable to detect the problems that it is suppose to monitor for.

What repairs can fix the P0195 code?

Additional comments for consideration regarding the P0195 code

A P0195 code is a generic code that all manufacturers can use and must always retain the same definition. The P0196 code is most commonly used for a wider variety of vehicles.

Each manufacturer utilizes a different diagnostic method for the testing of this system. Even then, it is often used in performance vehicles that are designed to be driven very hard. Driving in racing conditions pushes the vehicle to the limits of its engineering beyond what an everyday driver will experience. For this reason, an EOT system is not common on most vehicles.

Need help with a P0195 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.


Post a question and get free advice from our certified mechanics.


More related articles

P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the P0052 code means This code is seen when the Engine Control Module (ECM) tries to control the...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
P2159 OBD-II Trouble Code: Vehicle Speed Sensor B Range/Performance
Diagnostic Trouble Code (DTC): P2159 P2159 code definition Vehicle Speed Sensor B Range/Performance Related Trouble Codes: P2158: Vehicle Speed Sensor B P2160: Vehicle Speed Sensor B Circuit Low P2161:...

Related questions

Q: Check engine light on

The code P0442 is for a very small leak in the evaporative system of the fuel tank and its vent system. A leak in the gas cap is the most common cause of this code and the gas cap or...

Q: New battery & fuel pump. Hours later car starts and shuts down 3X in a row. Finally it starts, 48 hours later, won't start at all

Checking all the fuses was a good move. I would also want to put a scan tool on it and check for diagnostic trouble codes (DTCs) as well as seeing the data that the computer is seeing. A fuel pressure...

Q: Dash lights, hard and noisy shifting

You will need to get the fault codes read for your 2005 Mercury Montego. From the description you've given, it either sounds like a possible induction system issue in the electronic throttle control or possibly a transmission malfunction. Based on...