AutoCodes – Ford – P0112 2002 Ford F150

P0112 2002 Ford F150 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 2002 Ford F150 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 4,495

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 2002 Ford F150 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 2002 Ford F150 - Intake Air Temperature Sensor Circuit Low Input - AutoCodes.com — P0112 2002 Ford F150 Code - Intake Air Temperature Sensor Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0112 2002 Ford F150?

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 2002 Ford F150?

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 2002 Ford F150 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 2002 Ford F150 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 2002 Ford F150 Code

1. What are the common symptoms of OBDII code P0112 in a 2002 Ford F150?

- Common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and the check engine light illuminating.

2. What does the OBDII code P0112 in a 2002 Ford F150 indicate?

- The code P0112 indicates a low input signal from the Intake Air Temperature (IAT) sensor circuit.

3. What are the possible causes of the Intake Air Temperature Sensor Circuit Low Input code in a 2002 Ford F150?

- Possible causes include a faulty IAT sensor, damaged sensor wiring, loose or corroded connections, or issues with the sensor's ground circuit.

4. How can I diagnose the Intake Air Temperature Sensor Circuit Low Input code in my 2002 Ford F150?

- You can diagnose the issue by visually inspecting the sensor and its wiring, testing the sensor's resistance with a multimeter, and checking for proper voltage at the sensor connector.

5. Can I drive my 2002 Ford F150 with the OBDII code P0112 active?

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

6. How can I repair the Intake Air Temperature Sensor Circuit Low Input code in my 2002 Ford F150?

- Repair options may include replacing the faulty IAT sensor, repairing damaged wiring, securing loose connections, or addressing any issues with the sensor's ground circuit.

7. Will resetting the check engine light resolve the P0112 code in a 2002 Ford F150?

- Resetting the check engine light may temporarily clear the code, but it will return if the underlying issue causing the P0112 code is not addressed.

8. Are there any tips for preventing the Intake Air Temperature Sensor Circuit Low Input code in my 2002 Ford F150?

- Regularly inspecting the IAT sensor and its wiring, ensuring proper maintenance of the sensor, and addressing any issues promptly can help prevent the code from recurring.

9. How much does it typically cost to repair the P0112 code in a 2002 Ford F150?

- The cost of repairs can vary depending on the specific issue causing the P0112 code, but it may range from $100 to $300 for parts and labor.

10. Can a DIY enthusiast repair the Intake Air Temperature Sensor Circuit Low Input code in a 2002 Ford F150?

- Depending on the individual's skill level and access to tools, some DIY enthusiasts may be able to diagnose and repair the P0112 code themselves by following proper repair procedures and guidelines.