AutoCodes – Ford – P0109 Ford

P0109 Ford Code - Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent

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: P0109 Ford indicates Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent.
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 27,581

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
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P0109 Ford 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 signal is intermittent.

OBDII Code P0109 Ford - Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent - AutoCodes.com — P0109 Ford Code - Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent

What does this mean?

What are the Possible Causes of the DTC P0109 Ford?

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 P0109 Ford?

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 P0109 Ford 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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Information for Specific Ford Models

P0109 1997 Ford F150 — BARO Sensor Circuit Intermittent
P0109 1998 Ford F150 — BARO Sensor Circuit Intermittent
P0109 1999 Ford F150 — BARO Sensor Circuit Intermittent
P0109 2000 Ford F150 — BARO Sensor Circuit Intermittent
P0109 2001 Ford F150 — BARO Sensor Circuit Intermittent
P0109 2002 Ford F150 — BARO Sensor Circuit Intermittent
P0109 2003 Ford F150 — BARO Sensor Circuit Intermittent
P0109 2015 Ford F150 — Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent
P0109 2016 Ford F150 — Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent
P0109 2017 Ford F150 — Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent
P0109 2018 Ford F150 — Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent
P0109 2019 Ford F150 — Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent
P0109 2020 Ford F150 — Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent
P0109 2006 Ford Fusion — Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent
P0109 2007 Ford Fusion — Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent
P0109 2008 Ford Fusion — Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent
P0109 2009 Ford Fusion — Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent
P0109 2010 Ford Fusion — Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent
P0109 2011 Ford Fusion — Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent
P0109 2012 Ford Fusion — Manifold Absolute Pressure/Barometric Pressure Sensor Intermittent

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.