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P0114 Mercedes-Benz Code - Intake Air Temperature Circuit Intermittent

Quick Answer

The P0114 code for Mercedes-Benz vehicles indicates an issue with the Intake Air Temperature (IAT) Circuit being intermittent. Common causes include Faulty Intake Air Temperature sensor, Wiring or connection issues in the IAT circuit, ECM software malfunction. 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
P0114 Mercedes-Benz indicates Intake Air Temperature Circuit Intermittent.
Common causes
Common causes include Faulty Intake Air Temperature sensor, Wiring or connection issues in the IAT circuit, ECM software malfunction.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0114 Mercedes-Benz Description

The P0114 code for Mercedes-Benz vehicles indicates an issue with the Intake Air Temperature (IAT) Circuit being intermittent. The Intake Air Temperature sensor is responsible for measuring the temperature of the air entering the engine. This information is crucial for the Engine Control Module (ECM) to adjust the air-fuel mixture to optimize combustion and overall engine performance. When the ECM detects an intermittent signal from the IAT sensor, it can lead to various performance issues and potential long-term effects if not addressed promptly.

OBDII Code P0114 Mercedes-Benz - Intake Air Temperature Circuit Intermittent
P0114 Mercedes-Benz Code - Intake Air Temperature Circuit Intermittent

Common Causes of P0114 Mercedes-Benz

  1. Faulty Intake Air Temperature sensor
  2. Wiring or connection issues in the IAT circuit
  3. ECM software malfunction
  4. Intake air leaks near the sensor
  5. Environmental factors affecting sensor performance (e.g., heat exposure)

Symptoms of P0114 Mercedes-Benz

  1. Check Engine Light is illuminated
  2. Poor fuel efficiency
  3. Engine stalling or rough idling
  4. Engine performance issues
  5. Increased emissions

How to Fix P0114 Mercedes-Benz

  1. Begin by diagnosing the issue with a scan tool to confirm the P0114 code and ensure it is related to the IAT sensor.
  2. Inspect the wiring and connections in the IAT circuit for any damage or loose connections. Repair or replace as necessary.
  3. Test the Intake Air Temperature sensor using a multimeter to check for proper resistance values. Replace the sensor if it is faulty.
  4. Clear the code from the ECM memory and test drive the vehicle to ensure the issue has been resolved.
  5. If the code persists, further diagnostics may be required to identify any underlying issues with the ECM or other related components.

Cost to Fix P0114 Mercedes-Benz

The typical repair costs for addressing a P0114 code on a Mercedes-Benz vehicle can vary depending on the specific cause of the issue. In general, the cost of replacing a faulty Intake Air Temperature sensor can range from $50 to $150, while addressing wiring or connection issues may require additional labor costs. Overall, the total repair cost, including parts and labor, can range from $100 to $300 or more. It's important to note that diagnosis time and labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate based on your location and vehicle specifics.

When is the Code Detected?

The Engine Control Module (ECM) detected an erratic signal from the Intake Air Temperature (IAT) sensor during the system monitor test

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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 P0114 Mercedes-Benz Code

1. What are common symptoms of OBDII code P0114 in a Mercedes-Benz related to the Intake Air Temperature Circuit Intermittent?

- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling.

2. What are the possible causes of an Intake Air Temperature Circuit Intermittent fault code in a Mercedes-Benz?

- Causes may include a faulty intake air temperature sensor, damaged wiring or connectors, or issues with the engine control module (ECM).

3. How can I diagnose the Intake Air Temperature Circuit Intermittent issue in my Mercedes-Benz?

- Use an OBDII scanner to retrieve the specific code, visually inspect the sensor and its connections, and perform a voltage test to determine if the sensor is functioning properly.

4. Can a dirty air filter trigger the P0114 code in a Mercedes-Benz?

- Yes, a clogged or dirty air filter can disrupt the airflow around the intake air temperature sensor, potentially leading to an intermittent fault code like P0114.

5. Will driving with a P0114 fault code in my Mercedes-Benz cause further damage?

- Continuing to drive with the P0114 code may result in reduced engine efficiency and performance. It is advisable to address the issue promptly to prevent potential long-term damage.

6. How can I clear the P0114 code in my Mercedes-Benz after repairing the Intake Air Temperature Circuit issue?

- After fixing the underlying problem, you can clear the fault code using an OBDII scanner or by disconnecting the car's battery for a few minutes to reset the ECM.

7. Is it possible to repair the Intake Air Temperature Circuit issue in a Mercedes-Benz DIY-style?

- Depending on your automotive repair skills and access to tools, you may be able to replace the faulty sensor or repair wiring yourself. However, professional diagnosis and repair are recommended for complex issues.

8. Can extreme weather conditions affect the Intake Air Temperature Circuit and trigger the P0114 code in a Mercedes-Benz?

- Yes, extreme cold or heat can impact the sensor's readings and potentially lead to an intermittent fault code like P0114. Ensure the sensor is properly insulated and shielded from extreme temperatures.

9. How much does it typically cost to repair the Intake Air Temperature Circuit issue causing the P0114 code in a Mercedes-Benz?

- The cost of repairs can vary depending on the exact cause of the issue, but replacing a faulty sensor or repairing wiring may range from $100 to $300 at a dealership or repair shop.

10. What should I do if the P0114 code keeps reappearing in my Mercedes-Benz after repairs?

- If the code persists after repairs, it may indicate a deeper underlying issue or a faulty replacement part. Consult a professional mechanic or dealership for a thorough diagnosis and further troubleshooting.

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