AutoCodes – Ford – P0103 2019 Ford F150

P0103 2019 Ford F150 Code - Mass Or Volume Air Flow Sensor 'A' Circuit High Input

Quick Answer

The Mass Airflow (MAF) Sensor uses a hot wire sensing element to measure the amount of air entering the engine. Common causes include Dirty Air Filter, Faulty Mass Airflow (MAF) 'A' Sensor, Mass Airflow 'A' Sensor harness is open or shorted. 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: P0103 2019 Ford F150 indicates Mass Or Volume Air Flow Sensor 'A' Circuit High Input.
Common causes: Common causes include Dirty Air Filter, Faulty Mass Airflow (MAF) 'A' Sensor, Mass Airflow 'A' Sensor harness is open or shorted.
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 194

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
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P0103 2019 Ford F150 Description

The Mass Airflow (MAF) Sensor uses a hot wire sensing element to measure the amount of air entering the engine. The air passing over the hot wire causes it to cool. This hot wire is maintained at 200°C (392°F) above the ambient temperature as measured by a constant cold wire. The current required to maintain the temperature of the hot wire is proportional to the mass airflow. The MAF Sensor then outputs a signal to the Powertrain Control Module (PCM) proportional to the intake air mass. The PCM calculates the required fuel injector pulse width in order to provide the desired air to fuel ratio. The MAF sensor is located near the air cleaner assembly. Most MAF sensors have an integrated Intake Air Temperature (IAT) sensor. This Diagnostic Trouble Code (DTC) will be set when the Mass Airflow Sensor output changes above a maximum calibrated limit while the engine is running.

OBDII Code P0103 2019 Ford F150 - Mass Or Volume Air Flow Sensor 'A' Circuit High Input - AutoCodes.com — P0103 2019 Ford F150 Code - Mass Or Volume Air Flow Sensor 'A' Circuit High Input

What does this mean?

What are the Possible Causes of the DTC P0103 2019 Ford F150?

Dirty Air Filter
Faulty Mass Airflow (MAF) 'A' Sensor
Mass Airflow 'A' Sensor harness is open or shorted
Mass Airflow 'A' Sensor circuit poor electrical connection

How to Fix the DTC P0103 2019 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 does this mean?

Code Tech Notes

Before replacing the Mass Air Flow (MAF) Sensor, try replacing the air filter and cleaning the Mass Air Flow Sensor with low-compressed air or a Mass Air Flow Sensor Cleaner. Reset the code and drive the vehicle. If the code comes back, you must replace the Mass Air Flow Sensor to fix the problem.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0103 2019 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 P0103 2019 Ford F150 Code

1. What does the OBDII code P0103 mean for a 2019 Ford F150?

P0103 indicates a "Mass or Volume Air Flow Sensor 'A' Circuit High Input," meaning the MAF sensor is detecting an abnormally high voltage signal, which could be caused by a malfunction or wiring issue.

2. What are the common symptoms of a P0103 code in a 2019 Ford F150?

Symptoms can include poor engine performance, rough idling, reduced fuel efficiency, hesitation during acceleration, and sometimes an illuminated check engine light.

3. What causes the P0103 code to appear in a 2019 Ford F150?

Common causes include a faulty mass airflow (MAF) sensor, damaged or corroded wiring, a vacuum leak, or an improperly installed air filter.

4. Can a dirty air filter trigger the P0103 code in a 2019 Ford F150?

Yes, a clogged or dirty air filter can disrupt airflow and potentially cause the MAF sensor to send incorrect voltage signals, leading to a P0103 code.

5. How do I fix the P0103 code on my 2019 Ford F150?

Start by inspecting and cleaning the MAF sensor, checking and replacing the air filter if needed, and examining the wiring for damage. If the issue persists, the MAF sensor may need to be replaced.

6. Is it safe to drive my 2019 Ford F150 with the P0103 code?

While the vehicle may still run, driving with this code can lead to poor performance and reduced fuel efficiency. Prolonged driving without fixing the issue may cause further damage.

7. How much does it cost to fix a P0103 code in a 2019 Ford F150?

The repair cost can vary. Cleaning the MAF sensor or replacing a damaged air filter is inexpensive, but replacing the MAF sensor typically costs between $150 and $400, including parts and labor.

8. Can a vacuum leak cause the P0103 code on a 2019 Ford F150?

Yes, a vacuum leak can affect the airflow readings, potentially causing the MAF sensor to send high voltage signals and trigger the P0103 code.

9. Do I need to replace the MAF sensor to fix the P0103 code on my 2019 Ford F150?

Not necessarily. Cleaning the sensor or repairing wiring issues may resolve the problem. Replace the sensor only if itâ€™s confirmed to be faulty.

10. How can I prevent the P0103 code from reoccurring in my 2019 Ford F150?

Regularly inspect and replace the air filter, keep the MAF sensor clean, and maintain the intake system to avoid airflow disruptions and ensure proper operation.