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P1112 2008 Ford Fusion Code - Intake Air Temperature Sensor Intermittent Condition

Quick Answer

The P1112 diagnostic trouble code (DTC) for a 2008 Ford Fusion indicates an Intake Air Temperature Sensor Intermittent Condition. Common causes include Faulty IAT sensor, Loose or corroded electrical connections, Wiring harness issues. 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
P1112 2008 Ford Fusion indicates Intake Air Temperature Sensor Intermittent Condition.
Common causes
Common causes include Faulty IAT sensor, Loose or corroded electrical connections, Wiring harness issues.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P1112 2008 Ford Fusion Description

The P1112 diagnostic trouble code (DTC) for a 2008 Ford Fusion indicates an Intake Air Temperature Sensor Intermittent Condition. The Intake Air Temperature (IAT) sensor is a crucial component of the vehicle's engine management system, as it measures the temperature of the air entering the engine. This information is used by the engine control module (ECM) to adjust fuel delivery and ignition timing for optimal performance and efficiency. An intermittent condition means that the sensor is not providing a consistent signal to the ECM, which can lead to issues with engine performance, fuel economy, and emissions.

OBDII Code P1112 2008 Ford Fusion - Intake Air Temperature Sensor Intermittent Condition
P1112 2008 Ford Fusion Code - Intake Air Temperature Sensor Intermittent Condition

Common Causes of P1112 2008 Ford Fusion

  1. Faulty IAT sensor
  2. Loose or corroded electrical connections
  3. Wiring harness issues
  4. Intake air leaks
  5. ECM software issues

Symptoms of P1112 2008 Ford Fusion

  1. Rough idling or stalling
  2. Decreased fuel efficiency
  3. Engine hesitation or surging
  4. Check Engine Light illuminated
  5. Increased emissions

How to Fix P1112 2008 Ford Fusion

  1. Diagnose the issue by using a scan tool to read the DTC and check the IAT sensor's resistance and voltage values.
  2. Inspect the sensor, wiring, and connectors for any visible damage or corrosion. Replace any damaged components.
  3. Test the IAT sensor using a multimeter to ensure it is functioning within the manufacturer's specifications.
  4. Clear the DTC and reset the ECM to see if the issue persists after repairs.
  5. Test drive the vehicle to verify that the symptoms have been resolved.

Cost to Fix P1112 2008 Ford Fusion

The typical repair costs for addressing an Intake Air Temperature Sensor Intermittent Condition on a 2008 Ford Fusion can range from $100 to $300, including parts and labor. However, it's important to note that specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. Most auto repair shops charge between $80 and $150 per hour for labor, but rates may be higher in metropolitan areas or at dealerships, while independent shops may charge less. It is recommended to check local rates for a more accurate estimate.

What does this mean?

Tech Notes for P1112 2008 Ford Fusion

Before replacing the mass air flow sensor, try replacing the air filter and cleaning the air flow sensor with mass air flow sensor cleaner. Reset code and drive vehicle. If the code comes back, it may be necessary to replaced the mass air flow sensor. Monitor the IAT on a scan tool. Look for sudden changes in the reading when the harness is wiggled or the sensor is tapped.

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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 P1112 2008 Ford Fusion Code

1. What are the common symptoms of an Intake Air Temperature Sensor Intermittent Condition (OBDII code P1112) in a 2008 Ford Fusion?

The common symptoms include poor engine performance, reduced fuel efficiency, rough idling, and potential stalling.

2. What can cause the Intake Air Temperature Sensor Intermittent Condition in a 2008 Ford Fusion?

Possible causes include a faulty intake air temperature sensor, damaged wiring or connectors, loose connections, or a problem with the sensor circuit.

3. How can I diagnose the Intake Air Temperature Sensor Intermittent Condition on my 2008 Ford Fusion?

You can diagnose the issue by using an OBDII scanner to retrieve the trouble code P1112, visually inspecting the sensor and its connections, and performing a thorough check of the sensor circuit.

4. Can I drive my 2008 Ford Fusion with the P1112 code for the Intake Air Temperature Sensor Intermittent Condition?

It is not recommended to drive the vehicle with this code unresolved, as it can lead to further engine issues and potential breakdowns.

5. How can I repair the Intake Air Temperature Sensor Intermittent Condition on my 2008 Ford Fusion?

Repair options include replacing the intake air temperature sensor, repairing damaged wiring or connectors, ensuring proper sensor connection, and clearing the trouble code with an OBDII scanner.

6. Is it possible to reset the P1112 code on my 2008 Ford Fusion without fixing the underlying issue?

While you can clear the code temporarily with an OBDII scanner, it is crucial to address the root cause to prevent the code from reappearing.

7. How much does it cost to replace the intake air temperature sensor on a 2008 Ford Fusion?

The cost of replacing the sensor can vary depending on the location of the sensor, labor costs, and the brand of the replacement part, but it typically ranges from $50 to $150.

8. Can a dirty air filter trigger the Intake Air Temperature Sensor Intermittent Condition in a 2008 Ford Fusion?

A dirty air filter may affect the sensor readings indirectly by altering the air intake temperature, but it is not a direct cause of the P1112 trouble code.

9. Will the P1112 code for the Intake Air Temperature Sensor Intermittent Condition cause the check engine light to illuminate in a 2008 Ford Fusion?

Yes, the P1112 trouble code typically triggers the check engine light to illuminate on the dashboard of the 2008 Ford Fusion.

10. How long does it take to fix the Intake Air Temperature Sensor Intermittent Condition on a 2008 Ford Fusion?

The repair time can vary based on the extent of the issue and your experience level. It may take anywhere from 30 minutes to a few hours to diagnose and fix the problem.

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