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Engine-Codes – Ford – P0098 2008 Ford Fusion

P0098 2008 Ford Fusion Code - Intake Air Temperature Sensor 2 Circuit High Voltage

Quick Answer

The P0098 diagnostic trouble code (DTC) in a 2008 Ford Fusion indicates a problem with the Intake Air Temperature Sensor 2 Circuit, specifically detecting a high voltage. Common causes include Faulty IAT Sensor: The sensor itself may be malfunctioning, sending incorrect voltage signals to the ECM, Wiring Issues: Damaged or corroded wiring connecting the IAT sensor to the ECM can cause high voltage readings, ECM Malfunction: A problem with the engine control module could lead to misinterpretation of sensor data. 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
P0098 2008 Ford Fusion indicates Intake Air Temperature Sensor 2 Circuit High Voltage.
Common causes
Common causes include Faulty IAT Sensor: The sensor itself may be malfunctioning, sending incorrect voltage signals to the ECM, Wiring Issues: Damaged or corroded wiring connecting the IAT sensor to the ECM can cause high voltage readings, ECM Malfunction: A problem with the engine control module could lead to misinterpretation of sensor data.
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 Aug 30, 2024
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Code P0098 2008 Ford Fusion Description

The P0098 diagnostic trouble code (DTC) in a 2008 Ford Fusion indicates a problem with the Intake Air Temperature Sensor 2 Circuit, specifically detecting a high voltage. The Intake Air Temperature (IAT) sensor is responsible for monitoring the temperature of the air entering the engine. This information is crucial for the engine control module (ECM) to adjust the air-fuel mixture for optimal performance and efficiency. When the IAT sensor 2 circuit reports a high voltage, it means that the ECM is receiving a signal indicating that the intake air temperature is higher than expected. This can lead to incorrect fuel mixture adjustments, affecting engine performance and emissions.

OBDII Code P0098 2008 Ford Fusion - Intake Air Temperature Sensor 2 Circuit High Voltage
P0098 2008 Ford Fusion Code - Intake Air Temperature Sensor 2 Circuit High Voltage

Common Causes of P0098 2008 Ford Fusion

  1. Faulty IAT Sensor: The sensor itself may be malfunctioning, sending incorrect voltage signals to the ECM.
  2. Wiring Issues: Damaged or corroded wiring connecting the IAT sensor to the ECM can cause high voltage readings.
  3. ECM Malfunction: A problem with the engine control module could lead to misinterpretation of sensor data.
  4. Intake Air Leaks: Air leaks in the intake system before the sensor can affect the temperature readings.
  5. Aftermarket Modifications: Non-OEM parts or modifications to the intake system can impact sensor performance.

Symptoms of P0098 2008 Ford Fusion

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the check engine light on the dashboard.
  2. Reduced Fuel Efficiency: A faulty IAT sensor can cause the engine to run rich or lean, leading to decreased fuel efficiency.
  3. Rough Idle: Incorrect air-fuel mixture can result in a rough or erratic idle.
  4. Engine Stalling: In severe cases, the engine may stall due to improper fuel mixture adjustments.
  5. Decreased Performance: The vehicle may experience a decrease in power and overall performance.

How to Fix P0098 2008 Ford Fusion

  1. Diagnose the Issue: Use a scan tool to read the DTC and verify the high voltage reading from the IAT sensor 2 circuit.
  2. Inspect Wiring: Check the wiring harness for any damage or corrosion, repairing or replacing as necessary.
  3. Test IAT Sensor: Test the Intake Air Temperature Sensor 2 for proper functionality and replace if needed.
  4. Address Intake Air Leaks: Inspect the intake system for any leaks that may be affecting temperature readings.
  5. Clear Error Codes: After the repair, clear the DTC and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0098 2008 Ford Fusion

The cost of repairing a P0098 code on a 2008 Ford Fusion can vary depending on the specific cause of the issue. In general, the replacement of an Intake Air Temperature Sensor can cost between $50 to $200, while addressing wiring issues or other related components may add to the total cost. Labor rates at auto repair shops typically range from $80 to $150 per hour, so the total repair cost could be anywhere from $150 to $500 or more. It's advisable to consult with a professional mechanic to get an accurate estimate based on the specific diagnosis and repair needed for your vehicle.

What does this mean?

Tech Notes for P0098 2008 Ford Fusion

Try to clean the Intake Air Temperature sensor (built in the air flow meter) and the Map Senor/Intake Air Temperature sensor 2 with mass air flow sensor cleaner.

When is the Code Detected?

The Engine Control Module (ECM) has detected a high voltage condition on the Intake Air Temperature (IAT) circuit.

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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 P0098 2008 Ford Fusion Code

1. What are common symptoms of OBDII code P0098 in a 2008 Ford Fusion?

The common symptoms of OBDII code P0098 (Intake Air Temperature Sensor 2 Circuit High Voltage) in a 2008 Ford Fusion include poor engine performance, decreased fuel efficiency, and potential stalling or rough idling.

2. What causes the OBDII code P0098 in a 2008 Ford Fusion?

The most common cause of OBDII code P0098 in a 2008 Ford Fusion is a faulty intake air temperature sensor 2, which leads to the sensor reporting a high voltage signal to the engine control module.

3. How can I diagnose the issue related to OBDII code P0098 in my 2008 Ford Fusion?

To diagnose the issue related to OBDII code P0098 in a 2008 Ford Fusion, you can use a scan tool to check the sensor readings, visually inspect the sensor and its wiring for any damage, and perform a circuit test to check for continuity and proper voltage.

4. Can a dirty air filter trigger OBDII code P0098 in a 2008 Ford Fusion?

Yes, a dirty air filter can indirectly trigger OBDII code P0098 in a 2008 Ford Fusion by disrupting the proper airflow and temperature readings at the intake air temperature sensor, leading to high voltage signal readings.

5. How should I repair OBDII code P0098 in my 2008 Ford Fusion?

To repair OBDII code P0098 in a 2008 Ford Fusion, you may need to replace the intake air temperature sensor 2, reset the fault codes using a scan tool, and ensure that the sensor and its wiring are properly connected and functioning.

6. Is it safe to continue driving my 2008 Ford Fusion with OBDII code P0098?

It is not recommended to continue driving your 2008 Ford Fusion with OBDII code P0098 (Intake Air Temperature Sensor 2 Circuit High Voltage) as it can lead to poor engine performance, decreased fuel efficiency, and potential damage to other engine components.

7. Can a DIY enthusiast replace the intake air temperature sensor in a 2008 Ford Fusion to resolve OBDII code P0098?

Yes, a DIY enthusiast with proper tools and knowledge can replace the intake air temperature sensor in a 2008 Ford Fusion to resolve OBDII code P0098, but it is recommended to follow the manufacturer's guidelines and use quality replacement parts.

8. How much does it cost to repair OBDII code P0098 in a 2008 Ford Fusion at a professional mechanic?

The cost to repair OBDII code P0098 in a 2008 Ford Fusion at a professional mechanic can vary depending on the labor rates and parts prices, but it may typically range from $100 to $300, including diagnosis and sensor replacement.

9. Are there any preventive measures to avoid encountering OBDII code P0098 in a 2008 Ford Fusion?

To prevent encountering OBDII code P0098 in a 2008 Ford Fusion, it is recommended to regularly inspect and maintain the air intake system, replace the air filter as per the manufacturer's recommendations, and address any engine performance issues promptly.

10. Can extreme weather conditions affect the intake air temperature sensor and trigger OBDII code P0098 in a 2008 Ford Fusion?

Yes, extreme weather conditions such as excessive heat or cold can affect the intake air temperature sensor's readings and potentially trigger OBDII code P0098 in a 2008 Ford Fusion due to the sensor misinterpreting the air temperature.

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