AutoCodes – Ford – P0112 2008 Ford Fusion

P0112 2008 Ford Fusion Code - Intake Air Temperature Sensor Circuit Low Input

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: P0112 2008 Ford Fusion indicates Intake Air Temperature Sensor Circuit Low Input.
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 2,599

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
FAQs
Comments
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Code P0112 2008 Ford Fusion 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 low voltage from the sensor.

OBDII Code P0112 2008 Ford Fusion - Intake Air Temperature Sensor Circuit Low Input - AutoCodes.com — P0112 2008 Ford Fusion Code - Intake Air Temperature Sensor Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0112 2008 Ford Fusion?

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 P0112 2008 Ford Fusion?

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 P0112 2008 Ford Fusion 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 P0112 2008 Ford Fusion code?

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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 P0112 2008 Ford Fusion Code

1. What are the symptoms of OBDII code P0112 on a 2008 Ford Fusion?

- Common symptoms include poor fuel economy, rough idling, engine stalling, and a decrease in overall engine performance.

2. What does the OBDII code P0112 for a 2008 Ford Fusion indicate?

- This code signals that the Intake Air Temperature (IAT) sensor is reporting a low input to the engine control module.

3. What are the possible causes of the P0112 code on a 2008 Ford Fusion?

- The code can be triggered by a faulty IAT sensor, a damaged sensor connector, wiring issues, or a problem with the sensor circuit.

4. How can I diagnose the cause of the P0112 code on my 2008 Ford Fusion?

- To pinpoint the issue, you can use a multimeter to test the IAT sensor's resistance, check the sensor wiring for continuity, and inspect the sensor connector for damage.

5. Is it safe to drive with the P0112 code present on a 2008 Ford Fusion?

- It is not recommended to drive with the P0112 code as it can lead to poor engine performance and potential damage if left unresolved.

6. Can I fix the P0112 code on my 2008 Ford Fusion myself?

- Depending on your automotive knowledge, you may be able to replace the faulty IAT sensor or repair the wiring yourself. However, seeking professional help is advisable for accurate diagnosis and repair.

7. How much does it typically cost to repair the P0112 code on a 2008 Ford Fusion?

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

8. Will resetting the OBDII code P0112 on my 2008 Ford Fusion make it go away permanently?

- Resetting the code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear.

9. How important is the Intake Air Temperature sensor for the proper functioning of a 2008 Ford Fusion?

- The IAT sensor plays a crucial role in providing accurate data to the engine control module for optimal fuel delivery and performance, making it essential for proper engine operation.

10. Can a dirty air filter cause the P0112 code to appear on a 2008 Ford Fusion?

- While a dirty air filter can impact engine performance, it is not a direct cause of the P0112 code. Focus on checking the IAT sensor and related components for this specific issue.