AutoCodes – Ford – P0112 2003 Ford F150

P0112 2003 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 2003 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 4,722

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 2003 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 2003 Ford F150 - Intake Air Temperature Sensor Circuit Low Input - AutoCodes.com — P0112 2003 Ford F150 Code - Intake Air Temperature Sensor Circuit Low Input

What does this mean?

What are the Possible Causes of the DTC P0112 2003 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 2003 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 2003 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.

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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 2003 Ford F150 Code

1. What are the common symptoms of OBDII code P0112 on a 2003 Ford F150?

The common symptoms include poor engine performance, rough idling, decreased fuel efficiency, and in some cases, the Check Engine light may illuminate.

2. What does the OBDII code P0112 indicate in a 2003 Ford F150?

The code P0112 indicates that the Intake Air Temperature (IAT) sensor circuit is registering a low input signal.

3. What are the possible causes of the Intake Air Temperature Sensor Circuit Low Input code on a 2003 Ford F150?

Possible causes include a faulty IAT sensor, damaged wiring or connectors in the sensor circuit, or issues with the Engine Control Module (ECM).

4. How can I diagnose the cause of the P0112 code on my 2003 Ford F150?

Diagnose the code by inspecting the IAT sensor and its wiring for any visible damage, testing the sensor's resistance, and checking the ECM for any faults using a diagnostic tool.

5. Can I drive my 2003 Ford F150 with the P0112 code?

It is not recommended to drive with the P0112 code as it can lead to further engine issues and reduced performance. It is best to address the issue promptly.

6. Is it possible to reset the P0112 code on a 2003 Ford F150?

Yes, you can reset the code using an OBDII scanner. However, it is essential to address the underlying issue causing the code to prevent it from reoccurring.

7. How do I repair the Intake Air Temperature Sensor Circuit Low Input code on my 2003 Ford F150?

Repair options include replacing the faulty IAT sensor, repairing damaged wiring or connectors, or reprogramming the ECM if needed.

8. Can a dirty air filter trigger the P0112 code on a 2003 Ford F150?

A dirty air filter can indirectly affect the IAT sensor readings but is not a direct cause of the P0112 code. It is still essential to replace a dirty air filter for optimal engine performance.

9. How much does it typically cost to repair the P0112 code on a 2003 Ford F150?

The repair cost can vary depending on the cause of the issue. Replacing the IAT sensor can cost around $50-$100, while addressing wiring or ECM issues may incur additional labor costs.

10. Will the P0112 code on a 2003 Ford F150 affect the vehicle's emissions?

Yes, the P0112 code can impact the vehicle's emissions by causing inefficient fuel combustion, potentially leading to increased emissions output. It is crucial to address the issue promptly to maintain emissions compliance.