AutoCodes – Mercedes-Benz – P0199 Mercedes-Benz

P0199 Mercedes-Benz Code - Engine Oil Temperature Sensor Intermittent

Quick Answer

The engine oil temperature 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
P0199 Mercedes-Benz indicates Engine Oil Temperature Sensor Intermittent.
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 3,542
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Jun 14, 2020
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Code P0199 Mercedes-Benz Description

The engine oil temperature 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.
OBDII Code P0199 Mercedes-Benz - Engine Oil Temperature Sensor Intermittent - AutoCodes.com
P0199 Mercedes-Benz Code - Engine Oil Temperature Sensor Intermittent

What are the Possible Causes of the DTC P0199 Mercedes-Benz?

  • 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 P0199 Mercedes-Benz?

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 P0199 Mercedes-Benz 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 P0199 Mercedes-Benz code?

Need more information on how to fix the P0199 Mercedes-Benz code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0199 Mercedes-Benz code diagnosed by a professional: Find a repair shop in your area

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 P0199 Mercedes-Benz Code

1. What are the common symptoms of OBDII code P0199 in a Mercedes-Benz related to the Engine Oil Temperature Sensor Intermittent?

- Common symptoms include erratic engine performance, fluctuating oil temperature readings, and potential illumination of the Check Engine Light.

2. What are some possible causes of the Engine Oil Temperature Sensor Intermittent code (P0199) in a Mercedes-Benz?

- Possible causes can include a faulty oil temperature sensor, damaged wiring or connectors, low engine oil level, or a malfunctioning engine control module.

3. How can I diagnose the cause of the P0199 code in my Mercedes-Benz?

- To diagnose the issue, you can use an OBDII scanner to retrieve the specific fault codes, visually inspect the sensor and its connections, check the engine oil level, and perform a thorough inspection of the wiring harness.

4. Is it safe to continue driving my Mercedes-Benz with the P0199 code present?

- It is not recommended to drive your vehicle with the P0199 code, as it can lead to potential engine issues and inaccurate temperature readings, which may affect overall engine performance.

5. How can I repair the Engine Oil Temperature Sensor Intermittent code in my Mercedes-Benz?

- Repair options may include replacing the oil temperature sensor, repairing or replacing damaged wiring or connectors, ensuring the engine oil level is correct, and resetting the fault codes using an OBDII scanner.

6. Can I reset the Check Engine Light after repairing the P0199 code in my Mercedes-Benz?

- Yes, after completing the necessary repairs and addressing the root cause of the issue, you can use an OBDII scanner to reset the Check Engine Light and clear the fault codes.

7. Are there any maintenance tips to prevent the recurrence of the P0199 code in my Mercedes-Benz?

- Regularly checking the engine oil level, performing routine inspections of the sensor and wiring, and following the manufacturer's recommended maintenance schedule can help prevent the P0199 code from reoccurring.

8. Will the P0199 code affect the overall performance and fuel efficiency of my Mercedes-Benz?

- Yes, the P0199 code can impact the overall performance and fuel efficiency of your vehicle due to potential issues with engine temperature regulation and sensor accuracy.

9. How long does it typically take to repair the P0199 code in a Mercedes-Benz?

- The repair time can vary depending on the specific cause of the code, but it may take anywhere from 1-3 hours to diagnose and address the issue successfully.

10. Can I fix the P0199 code in my Mercedes-Benz myself, or should I take it to a professional mechanic?

- While some DIY enthusiasts may be able to address the P0199 code themselves if they have the necessary tools and knowledge, it is recommended to consult a professional mechanic for accurate diagnosis and repair to ensure the issue is resolved correctly.

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