AutoCodes – Ford – P1112 2007 Ford Fusion

P1112 2007 Ford Fusion Code - Intake Air Temperature Sensor Intermittent Condition

Quick Answer

The IAT sensor is a thermistor device in which resistance changes with temperature. Common causes include Faulty Intake Air Temperature Sensor, Intake Air Temperature Sensor harness is open or shorted, Intake Air Temperature 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: P1112 2007 Ford Fusion indicates Intake Air Temperature Sensor Intermittent Condition.
Common causes: Common causes include Faulty Intake Air Temperature Sensor, Intake Air Temperature Sensor harness is open or shorted, Intake Air Temperature 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 2,621

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 Apr 19, 2019

Description
Possible Causes
How To Fix
Tech Notes
Cost to Diagnose
FAQs
Comments
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Code P1112 2007 Ford Fusion Description

The IAT sensor is a thermistor device in which resistance changes with temperature. The electrical resistance of a thermistor decreases as the temperature increases, and the resistance increases as the temperature decreases. The varying resistance affects the voltage drop across the sensor terminals and provides electrical signals to the Powertrain Control Module (PCM) corresponding to temperature.
Thermistor-type sensors are considered passive sensors. A passive sensor is connected to a voltage divider network so that varying the resistance of the passive sensor causes a variation in total current flow. Voltage that is dropped across a fixed resistor in a series with the sensor resistor determines the voltage signal at the PCM. This voltage signal is equal to the reference voltage minus the voltage drop across the fixed resistor.
The IAT sensor provides air temperature information to the PCM. The PCM uses the air temperature information as a correction factor in the calculation of fuel, spark, and air flow.
The IAT sensor provides a quicker temperature change response time than the ECT or CHT sensor.
Currently there are 2 types of IAT sensors used, a stand alone, non-integrated type and an integrated type. Both types function the same, however the integrated type is incorporated into the mass air flow (MAF) sensor instead of being a stand-alone sensor.

OBDII Code P1112 2007 Ford Fusion - Intake Air Temperature Sensor Intermittent Condition - AutoCodes.com — P1112 2007 Ford Fusion Code - Intake Air Temperature Sensor Intermittent Condition

What does this mean?

What are the Possible Causes of the DTC P1112 2007 Ford Fusion?

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

How to Fix the DTC P1112 2007 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 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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P1112 2007 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.

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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 2007 Ford Fusion Code

1. What are the common symptoms of an Intake Air Temperature Sensor Intermittent Condition (OBDII code P1112) on a 2007 Ford Fusion?

- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and potential stalling or hesitation during acceleration.

2. What are the possible causes of the Intake Air Temperature Sensor Intermittent Condition (P1112) in a 2007 Ford Fusion?

- Potential causes include a faulty intake air temperature sensor, wiring issues, corroded connectors, or a problem with the sensor's circuit.

3. How can I diagnose the Intake Air Temperature Sensor Intermittent Condition (OBDII code P1112) on my 2007 Ford Fusion?

- Diagnosis involves using an OBDII scanner to retrieve the trouble code, inspecting the intake air temperature sensor and its wiring for damage, and checking for loose connections.

4. Can a dirty air filter cause the Intake Air Temperature Sensor Intermittent Condition (P1112) on a 2007 Ford Fusion?

- Yes, a dirty or clogged air filter can affect the intake air temperature readings, potentially triggering the P1112 trouble code.

5. What is the recommended repair for an Intake Air Temperature Sensor Intermittent Condition (OBDII code P1112) on a 2007 Ford Fusion?

- The recommended repair involves replacing the faulty intake air temperature sensor, repairing any damaged wiring or connectors, and clearing the trouble code with an OBDII scanner.

6. Is it safe to continue driving with the Intake Air Temperature Sensor Intermittent Condition (P1112) on a 2007 Ford Fusion?

- It is not recommended to drive with a faulty intake air temperature sensor, as it can lead to poor engine performance and potential drivability issues. It's best to address the issue promptly.

7. Can a DIY enthusiast replace the Intake Air Temperature Sensor on a 2007 Ford Fusion to resolve the P1112 trouble code?

- Yes, replacing the intake air temperature sensor is a relatively straightforward repair that can be done by a DIY enthusiast with basic automotive knowledge and tools.

8. Will resetting the check engine light resolve the Intake Air Temperature Sensor Intermittent Condition (OBDII code P1112) on a 2007 Ford Fusion?

- Resetting the check engine light may temporarily turn off the warning indicator, but it will not address the underlying issue causing the P1112 trouble code. The root cause should be diagnosed and repaired.

9. How much does it typically cost to replace the Intake Air Temperature Sensor on a 2007 Ford Fusion to fix the P1112 trouble code?

- The cost of replacing the intake air temperature sensor can vary depending on the quality of the sensor and labor rates, but it generally ranges from $50 to $150 for parts and labor.

10. Are there any preventive maintenance tips to avoid encountering the Intake Air Temperature Sensor Intermittent Condition (P1112) on a 2007 Ford Fusion in the future?

- Regularly inspecting and cleaning the intake air temperature sensor, ensuring proper air filter maintenance, and addressing any wiring issues promptly can help prevent the recurrence of the P1112 trouble code.