AutoCodes – Ford – P0108 2018 Ford F150

P0108 2018 Ford F150 Code - Manifold Absolute Pressure/Barometric Pressure Sensor High Input

Quick Answer

The Manifold Absolute Pressure (MAP) Sensor is located on the intake manifold and measures the intake manifold pressure. Common causes include Faulty Manifold Absolute Pressure (MAP) Sensor, Manifold Absolute Pressure Sensor harness is open or shorted, Manifold Absolute Pressure 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: P0108 2018 Ford F150 indicates Manifold Absolute Pressure/Barometric Pressure Sensor High Input.
Common causes: Common causes include Faulty Manifold Absolute Pressure (MAP) Sensor, Manifold Absolute Pressure Sensor harness is open or shorted, Manifold Absolute Pressure 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.

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Code Popularity 265

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Sep 21, 2023

Description
Step-by-Step Diagnostic Guide
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0108 2018 Ford F150 Description

The Manifold Absolute Pressure (MAP) Sensor is located on the intake manifold and measures the intake manifold pressure. The Powertrain Control Module (PCM) uses this information to determine the air charge and to provide the input for various engine control functions. Under normal operation, the greatest pressure that can exist in the intake manifold is at ignition ON, and engine OFF, which is equal to the Barometric Pressure (BARO). The lowest manifold pressure occurs when the vehicle is idling or decelerating. The ECM monitors the MAP sensor signal for pressure outside of the normal range. The sensor translates this action into electrical resistance. The MAP sensor may be integrated with an Intake Air Temperature (IAT) sensor. The Diagnostic Trouble Code (DTC) will be set when the MAP Sensor operating voltage is greater than the maximum allowable calibrated parameter of 4.96 volts.

OBDII Code P0108 2018 Ford F150 - Manifold Absolute Pressure/Barometric Pressure Sensor High Input - AutoCodes.com — P0108 2018 Ford F150 Code - Manifold Absolute Pressure/Barometric Pressure Sensor High Input

What does this mean?

What are the Possible Causes of the DTC P0108 2018 Ford F150?

Faulty Manifold Absolute Pressure (MAP) Sensor
Manifold Absolute Pressure Sensor harness is open or shorted
Manifold Absolute Pressure Sensor circuit poor electrical connection

How to Fix the DTC P0108 2018 Ford F150?

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 P0108 2018 Ford F150 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.

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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 2018 Ford F150 Code

1. What does the OBDII code P0108 indicate on a 2018 Ford F150?

- Code P0108 indicates that the Manifold Absolute Pressure (MAP) sensor or Barometric Pressure (BARO) sensor in your 2018 Ford F150 is sending a higher voltage signal than expected, suggesting a high input error.

2. What are common symptoms of the P0108 code in a 2018 Ford F150?

- Symptoms include a check engine light, rough idling, engine hesitation or stalling, poor fuel economy, and sometimes a hard start condition.

3. What can cause a P0108 code to appear on a 2018 Ford F150?

- Common causes include a faulty MAP sensor, wiring issues like shorts or open circuits in the MAP sensor harness, a bad electrical connection to the MAP sensor, or a vacuum leak in the intake manifold.

4. How can I diagnose the P0108 code in my 2018 Ford F150?

- Start by inspecting the MAP sensor and its connections for any signs of damage or loose connections. Check the voltage output of the MAP sensor with a multimeter, and compare it to manufacturer specifications. Also, inspect for any vacuum leaks or obstructions in the intake manifold.

5. What are the steps to fix the P0108 code on a 2018 Ford F150?

- Repair or replace any damaged wiring or connectors, replace the MAP sensor if it's faulty, and fix any vacuum leaks in the intake system. Reset the engine control module (ECM) to clear the code and conduct a road test to ensure the repair was successful.

6. Is it safe to drive my 2018 Ford F150 with a P0108 code?

- While you can drive with a P0108 code, it's not advisable as it can lead to engine performance issues, higher emissions, and potentially more serious engine problems if not addressed promptly.

7. Can a P0108 code affect the fuel economy of my 2018 Ford F150?

- Yes, a faulty MAP sensor can lead to incorrect air-fuel mixture adjustments, resulting in poor fuel economy and decreased engine performance.

8. What tools are needed to diagnose and repair a P0108 code?

- You'll need an OBD-II scanner to read the code and monitor live data, a multimeter for electrical tests, basic hand tools to access and replace the MAP sensor, and possibly a smoke machine to detect vacuum leaks.

9. How often does the MAP sensor need to be replaced in vehicles like the 2018 Ford F150?

- The MAP sensor doesn't have a specific replacement interval, but it should be replaced if diagnostic testing confirms it is malfunctioning or if it shows signs of physical damage.

10. Could a P0108 code be triggered by an issue other than the MAP sensor in a 2018 Ford F150?

- Yes, while the MAP sensor is a common culprit, the code could also be triggered by issues with the ECM, problems in the wiring or connector, or even environmental factors such as high altitude affecting the barometric pressure readings.