AutoCodes – Ford – P0127 Ford

P0127 Ford Code - Intake Air Temperature Too High

Quick Answer

The Intake Air Temperature (IAT) sensor is built into Mass Air Flow (MAF) sensor. Common causes include Dirty Air Filter, Faulty Intake Air Temperature (IAT) Sensor, Intake Air Temperature 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: P0127 Ford indicates Intake Air Temperature Too High.
Common causes: Common causes include Dirty Air Filter, Faulty Intake Air Temperature (IAT) Sensor, Intake Air Temperature 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 10,901

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 Jul 13, 2020

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
Comments
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Code P0127 Ford Description

The Intake Air Temperature (IAT) sensor is built into Mass Air Flow (MAF) sensor. The sensor detects intake air temperature and transmits a signal to the Powertrain Control Module (PCM). The temperature sensing unit uses a thermistor which is sensitive to the change in temperature. The electrical resistance of the thermistor decreases in response to the temperature rise. The Intake Air Temperature signal is used as an input for various systems in the vehicle. It is used by the Powertrain Control Module to assist with the calculation of idle speed, fuel mixture, and spark advance. The Diagnostic Trouble Code (DTC) will set when the PCM detects an excessively high voltage from the sensor.

OBDII Code P0127 Ford - Intake Air Temperature Too High - AutoCodes.com — P0127 Ford Code - Intake Air Temperature Too High

What does this mean?

What are the Possible Causes of the DTC P0127 Ford?

Dirty Air Filter
Faulty Intake Air Temperature (IAT) Sensor
Intake Air Temperature Sensor harness is open or shorted
Intake Air Temperature Sensor circuit poor electrical connection
Faulty Powertrain Control Module (PCM)

How to Fix the DTC P0127 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 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 Mass Air Flow sensor cleaner. Reset code and drive the vehicle. If the code comes back, it may be necessary to replace the Mass Air Flow sensor.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0127 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.

Need more information about the P0127 Ford code?

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Information for Specific Ford Models

P0127 1997 Ford F150 — Intake Air Temperature Too High
P0127 1998 Ford F150 — Intake Air Temperature Too High
P0127 1999 Ford F150 — Intake Air Temperature Too High
P0127 2000 Ford F150 — Intake Air Temperature Too High
P0127 2001 Ford F150 — Intake Air Temperature Too High
P0127 2002 Ford F150 — Intake Air Temperature Too High
P0127 2003 Ford F150 — Intake Air Temperature Too High
P0127 2006 Ford Fusion — Intake Air Temperature 2 Sensor Too High
P0127 2007 Ford Fusion — Intake Air Temperature 2 Sensor Too High
P0127 2008 Ford Fusion — Intake Air Temperature 2 Sensor Too High
P0127 2009 Ford Fusion — Intake Air Temperature 2 Sensor Too High
P0127 2010 Ford Fusion — Intake Air Temperature 2 Sensor Too High
P0127 2011 Ford Fusion — Intake Air Temperature 2 Sensor Too High
P0127 2012 Ford Fusion — Intake Air Temperature 2 Sensor Too High

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.