Engine-CodesFord – P0108 2008 Ford Fusion

P0108 2008 Ford Fusion Code - Manifold Absolute Pressure/Barometric Pressure Sensor High Input

Quick Answer

The P0108 diagnostic trouble code (DTC) for a 2008 Ford Fusion indicates a high input from the Manifold Absolute Pressure (MAP) sensor or Barometric Pressure (BARO) sensor. Common causes include Faulty MAP/BARO Sensor: The sensor itself may be malfunctioning, providing incorrect pressure readings to the ECM, Wiring Issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the signal and trigger the high input code, Vacuum Leaks: Any leaks in the intake manifold or vacuum lines can affect pressure readings and cause the ECM to detect a high input. 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
P0108 2008 Ford Fusion indicates Manifold Absolute Pressure/Barometric Pressure Sensor High Input.
Common causes
Common causes include Faulty MAP/BARO Sensor: The sensor itself may be malfunctioning, providing incorrect pressure readings to the ECM, Wiring Issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the signal and trigger the high input code, Vacuum Leaks: Any leaks in the intake manifold or vacuum lines can affect pressure readings and cause the ECM to detect a high input.
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.
Table of contents Created and updated by William Orellana on Sep 13, 2024
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Code P0108 2008 Ford Fusion Description

The P0108 diagnostic trouble code (DTC) for a 2008 Ford Fusion indicates a high input from the Manifold Absolute Pressure (MAP) sensor or Barometric Pressure (BARO) sensor. The MAP sensor measures the pressure inside the intake manifold, providing crucial data to the engine control module (ECM) to determine the air/fuel mixture for optimal combustion. The BARO sensor, on the other hand, measures the atmospheric pressure outside the engine, helping the ECM adjust fuel delivery based on altitude changes.

OBDII Code P0108 2008 Ford Fusion - Manifold Absolute Pressure/Barometric Pressure Sensor High Input
P0108 2008 Ford Fusion Code - Manifold Absolute Pressure/Barometric Pressure Sensor High Input

Common Causes of P0108 2008 Ford Fusion

  1. Faulty MAP/BARO Sensor: The sensor itself may be malfunctioning, providing incorrect pressure readings to the ECM.
  2. Wiring Issues: Damaged or corroded wiring connecting the sensor to the ECM can disrupt the signal and trigger the high input code.
  3. Vacuum Leaks: Any leaks in the intake manifold or vacuum lines can affect pressure readings and cause the ECM to detect a high input.
  4. Faulty ECM: In rare cases, a malfunctioning ECM may misinterpret sensor data and trigger the P0108 code.

Symptoms of P0108 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 Engine Performance: The vehicle may experience a lack of power, hesitation, or rough idling due to incorrect fuel delivery.
  3. Poor Fuel Efficiency: Incorrect air/fuel mixture can lead to decreased fuel efficiency, resulting in more frequent trips to the gas station.
  4. Emission Issues: A malfunctioning MAP/BARO sensor can cause increased emissions, potentially leading to a failed emissions test.

How to Fix P0108 2008 Ford Fusion

  1. Diagnostic Scan: Use a diagnostic scan tool to retrieve the trouble code and confirm the high input from the MAP/BARO sensor.
  2. Check Wiring and Connections: Inspect the wiring harness and connectors for any damage or corrosion. Repair or replace as needed.
  3. Test MAP/BARO Sensor: Test the sensor using a multimeter to ensure it is providing accurate readings. Replace if faulty.
  4. Check for Vacuum Leaks: Perform a smoke test to identify any vacuum leaks in the intake manifold or lines. Repair leaks accordingly.
  5. Clear Codes and Test Drive: Clear the DTC from the ECM memory, then test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0108 2008 Ford Fusion

The typical repair costs for addressing a P0108 code on a 2008 Ford Fusion can vary depending on the specific cause of the issue. In general, replacing a faulty MAP/BARO sensor can cost between $100 and $200, including parts and labor. However, if the problem is related to wiring issues or vacuum leaks, additional diagnostic time and repair costs may apply.

Tech Notes for P0108 2008 Ford Fusion

You can try to clean the MAP (Manifold Absolute Pressure) sensor with a mass air flow sensor cleaner.

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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 P0108 2008 Ford Fusion Code

1. What are the common symptoms of OBDII code P0108 on a 2008 Ford Fusion?

- Common symptoms include rough idling, engine hesitation, poor fuel efficiency, and stalling.

2. What does the OBDII code P0108 on a 2008 Ford Fusion indicate?

- The code indicates a high input from the Manifold Absolute Pressure (MAP) or Barometric Pressure Sensor.

3. What are the possible causes of OBDII code P0108 on a 2008 Ford Fusion?

- Possible causes include a faulty MAP sensor, damaged wiring or connectors, vacuum leaks, or a problem with the engine's computer.

4. How can I diagnose the issue causing OBDII code P0108 on my 2008 Ford Fusion?

- You can use a diagnostic scanner to read the code, visually inspect the sensor and its connections, check for vacuum leaks, and perform a voltage test on the sensor.

5. Can I still drive my 2008 Ford Fusion with OBDII code P0108 active?

- It is not recommended to drive the vehicle with this code active, as it can lead to poor engine performance and potential damage if left unresolved.

6. How can I repair OBDII code P0108 on my 2008 Ford Fusion?

- The repair typically involves replacing the faulty MAP sensor, repairing any damaged wiring or connectors, and clearing the error code with a diagnostic scanner.

7. Are there any DIY tips for fixing OBDII code P0108 on a 2008 Ford Fusion?

- While some may attempt the repair themselves, it is recommended to have a professional diagnose and repair the issue to ensure it is done correctly.

8. How much does it cost to fix OBDII code P0108 on a 2008 Ford Fusion?

- The cost can vary depending on the exact cause of the issue, but it generally ranges from $100 to $300 for parts and labor.

9. Will resetting the error code make OBDII code P0108 go away permanently?

- Resetting the error code may temporarily clear it, but if the underlying issue is not addressed, the code is likely to reappear.

10. Can a clogged air filter cause OBDII code P0108 on a 2008 Ford Fusion?

- A clogged air filter can restrict airflow and potentially affect sensor readings, but it is not a common cause of OBDII code P0108.

Discuss the causes and fixes for P0108 2008 Ford Fusion OBDII Code

  • MI AUTO FORD FUSION 2008 PRESENTA LA SIGUIENTE FALLA, ARRANCA NORMAL CUANDO ESTOY APROXIMADAMENTE A 40 KM/H , LAS RPM SUBEN BRUSCAMENTE HASTA 4OOORPM PERO EL CARRO N O SE DESPLAZA, LUEGO DE ESTO PRESENTA UNA FALLA QUE NO QUIERE ACELERAR, EN EL TABLERO APARECE UNA LLAVE ESPAÑOLA Y REGISTRA FALLA EN EL ESCANER P0108, HE LIMPIADO CUERPO DE ACELARACION, HE LIMPIADO EL MAP Y EL MAF PERO CONTINUA CON LA FALLA, QUE ME RECOMIENDAN HACER

  • No creo que ese codigo este relacionado con su problema. Parece que tiene problema con la transmision. El Ford Fusion tiene muchos problemas con la transmision.