OBD-II Generic Error Code P0195: Engine Oil Temp Sensor Circuit - How to Fix It

Easy 30-60 minutes Medium Severity Verified June 2026
Error Code
P0195
Brand
OBD-II Generic
Product Type
automotive
Severity
Medium
DIY Difficulty
Easy
Estimated Fix Time
30-60 minutes
OBD-II error code P0195 indicates a problem with the engine oil temperature (EOT) sensor circuit. This sensor monitors oil temperature to help the engine control module (ECM) adjust fuel delivery and other parameters. When the circuit is malfunctioning, you may experience poor performance, reduced fuel economy, or a check engine light. This guide will help you troubleshoot and fix the issue.
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Tools You'll Need

How to Fix Error Code P0195

  1. Check Engine Oil Level and Condition

    Let the engine cool down before checking oil.
  2. Inspect the Oil Temperature Sensor Connector

    Disconnect the battery before working on electrical components.
  3. Test the Sensor Circuit with a Multimeter

  4. Replace the Engine Oil Temperature Sensor

    Be careful not to overtighten the sensor; follow torque specs.
  5. Test and Clear the Code

Parts You May Need

Engine Oil Temperature Sensor
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Wire connectors/pigtail
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Engine Oil Temperature Sensor
Check Price on Amazon
Wire connectors/pigtail
Check Price on Amazon
Engine Oil Temperature Sensor
Check Price on Amazon
Wire connectors/pigtail
Check Price on Amazon
Engine Oil Temperature Sensor
Check Price on Amazon
Wire connectors/pigtail
Check Price on Amazon
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When to Call a Professional

If you have replaced the sensor and checked the wiring but the code persists, the problem could be a faulty ECM or a deeper wiring issue. Consult a professional mechanic for advanced diagnostics.

Frequently Asked Questions

Can I drive with error code P0195?
Yes, but it's not recommended for long distances. The engine may run poorly, and fuel economy could suffer. It's best to diagnose and fix the issue promptly.
Will a bad oil temperature sensor cause a check engine light?
Yes, P0195 triggers the check engine light. The sensor's signal is used by the ECM, and a fault in the circuit will illuminate the light.
How much does it cost to fix error P0195?
The sensor itself costs around $20-60. Labor at a shop may add $50-150. DIY replacement saves labor costs.
What are symptoms of a faulty engine oil temperature sensor?
Symptoms include poor engine performance, hard starting, increased fuel consumption, and the check engine light.
Can a bad oil temperature sensor damage the engine?
It is unlikely to cause immediate damage, but incorrect oil temperature readings can lead to improper fuel mixture or timing, potentially causing long-term wear.