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P0112 2002 Ford F150 Code - Intake Air Temperature Sensor Circuit Low Input

Quick Answer

The P0112 diagnostic trouble code (DTC) for a 2002 Ford F150 indicates that there is a low input signal from the Intake Air Temperature (IAT) sensor circuit. Common causes include Faulty Intake Air Temperature (IAT) sensor, Damaged or corroded wiring in the IAT sensor circuit, Loose or poor connection at the IAT sensor. 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 Faulty Intake Air Temperature (IAT) sensor, Damaged or corroded wiring in the IAT sensor circuit, Loose or poor connection at the IAT sensor.
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 14, 2024
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Code P0112 2002 Ford F150 Description

The P0112 diagnostic trouble code (DTC) for a 2002 Ford F150 indicates that there is a low input signal from the Intake Air Temperature (IAT) sensor circuit. The IAT sensor is a crucial component of the 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.

OBDII Code P0112 2002 Ford F150 - Intake Air Temperature Sensor Circuit Low Input
P0112 2002 Ford F150 Code - Intake Air Temperature Sensor Circuit Low Input

Common Causes of P0112 2002 Ford F150

  1. Faulty Intake Air Temperature (IAT) sensor
  2. Damaged or corroded wiring in the IAT sensor circuit
  3. Loose or poor connection at the IAT sensor
  4. ECM software issue affecting IAT sensor readings
  5. Intake air leaks affecting sensor accuracy

Symptoms of P0112 2002 Ford F150

  1. Check Engine Light illuminated on the dashboard
  2. Reduced engine performance or hesitation during acceleration
  3. Poor fuel economy
  4. Rough idling or stalling
  5. Engine running too rich or too lean

How to Fix P0112 2002 Ford F150

  1. Begin by locating the IAT sensor, typically located near the air intake manifold.
  2. Inspect the wiring and connector for any damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test the IAT sensor using a multimeter to ensure it is functioning correctly. Replace the sensor if it is faulty.
  4. Clear the DTC using an OBD-II scanner and test drive the vehicle to verify that the issue has been resolved.
  5. If the Check Engine Light does not reappear and the symptoms have been eliminated, the repair process is complete.

Cost to Fix P0112 2002 Ford F150

The typical repair costs for addressing a P0112 code on a 2002 Ford F150 can vary depending on the specific cause of the issue. In general, the cost of a new IAT sensor ranges from $20 to $50, while labor costs can range from $80 to $150 per hour. Additional costs may include diagnostic time and any necessary wiring repairs. Overall, the total repair cost for this issue could range from $100 to $300, but it is advisable to check with local auto repair shops for a more accurate estimate based on your location and vehicle specifics.

What does this mean?

Tech Notes for P0112 2002 Ford F150

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.

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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.

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