AutoCodes – Infiniti – P0198 Infiniti

P0198 Infiniti Code - Engine Oil Temperature Sensor Circuit High Input

Quick Answer

The Engine Oil Temperature (EOT) Sensor is used to detect the engine oil temperature. Common causes include Faulty Engine Oil Temperature sensor, Engine Oil Temperature sensor harness is open or shorted, Engine Oil Temperature sensor circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
P0198 Infiniti indicates Engine Oil Temperature Sensor Circuit High Input.
Common causes
Common causes include Faulty Engine Oil Temperature sensor, Engine Oil Temperature sensor harness is open or shorted, Engine Oil Temperature sensor circuit poor electrical connection.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 12,453
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 22, 2024
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Code P0198 Infiniti Description

The Engine Oil Temperature (EOT) Sensor is used to detect the engine oil temperature. The sensor modifies a voltage signal from the Engine Control Module (ECM). The modified signal returns to the ECM as the engine oil temperature input. The sensor uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases as temperature increases. The P0198 indicates the Engine Oil Temperature Sensor signal voltage is high (low temperature).
OBDII Code P0198 Infiniti - Engine Oil Temperature Sensor Circuit High Input - AutoCodes.com
P0198 Infiniti Code - Engine Oil Temperature Sensor Circuit High Input

What are the Possible Causes of the DTC P0198 Infiniti?

  • Faulty Engine Oil Temperature sensor
  • Engine Oil Temperature sensor harness is open or shorted
  • Engine Oil Temperature sensor circuit poor electrical connection

How to Fix the DTC P0198 Infiniti?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0198 Infiniti code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0198 Infiniti code?

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Need Help with the Code?

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about P0198 Infiniti Code

No Frequently Asked Questions about P0198 Infiniti Code found.

Discuss the causes and fixes for P0198 Infiniti OBDII Code

  • Hi guys
    I had my engine replaced on my 2013 Infinity G37 about 6mths ago by the dealer with only 70000 miles on the car, I have only driven the car about 500 miles since the motor was replaced. The other day while driving to my dissapointment the service engine soon light appeared. I brought the car to Auto Zone who read the coce as a P198, I then brought the car to Infinity dealer who reset the ecm , but the code came back..after driving about 10 miles. I am bringing back for service Sat, any ideas about what may be doing on and how concerned should I be over this ?

  • Are there any other symptoms? engine noise?
    I never had that problem before; my best guess is that they may have damage the wire from the sensor to the ECM during the engine installation. The sensor rarely goes bad, the only problem is that sometimes the sensor leaks, but no engine light.
    If the engine oil level is OK and there are no other symptoms, then you shouldn't be concern, but the dealer has to fix the problem.

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