AutoCodes – GMC – P0112 2014 GMC Sierra

P0112 2014 GMC Sierra Code - Intake Air Temperature Sensor Circuit Low Voltage

Quick Answer

The intake air temperature (IAT) sensor 1 is a variable resistor that measures the temperature of the air in the sensor bore. 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 2014 GMC Sierra indicates Intake Air Temperature Sensor Circuit Low Voltage.
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 224

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 May 20, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0112 2014 GMC Sierra Description

The intake air temperature (IAT) sensor 1 is a variable resistor that measures the temperature of the air in the sensor bore. The Engine Control Module (ECM) supplies 5 V to the IAT sensor 1 signal circuit and a ground for the IAT sensor 1 low reference circuit. The signal varies with inlet air temperature and is displayed by the scan tool as °C (°F). The multifunction intake air sensor houses the IAT sensor 1, IAT sensor 2, Humidity sensor, Mass Air Flow (MAF) sensor and BARO pressure sensor. The Diagnostic Trouble Code (DTC) ECM detects that the IAT sensor 1 signal is warmer than 149°C (300°F) for greater than 5 s.

OBDII Code P0112 2014 GMC Sierra - Intake Air Temperature Sensor Circuit Low Voltage - AutoCodes.com — P0112 2014 GMC Sierra Code - Intake Air Temperature Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0112 2014 GMC Sierra?

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 Engine Control Module (ECM)

How to Fix the DTC P0112 2014 GMC Sierra?

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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0112 2014 GMC Sierra 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 2014 GMC Sierra 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 2014 GMC Sierra Code

1. What does the OBDII code P0112 mean on a 2014 GMC Sierra?

P0112 indicates that the Intake Air Temperature (IAT) sensor is reporting a low voltage signal, which typically means the sensor is detecting an abnormally low air temperature or there is an electrical issue.

2. What are the symptoms of code P0112 on a 2014 GMC Sierra?

Common symptoms include poor engine performance, reduced fuel efficiency, rough idling, difficulty starting the engine, and potentially the check engine light being illuminated.

3. What causes the P0112 code on a 2014 GMC Sierra?

Possible causes include a faulty IAT sensor, damaged or corroded wiring, a loose electrical connector, or a short circuit in the IAT sensor circuit.

4. Can I drive my 2014 GMC Sierra with a P0112 code?

While the vehicle may still be drivable, it could experience reduced performance and fuel efficiency. It’s best to address the issue promptly to avoid potential engine damage or further complications.

5. How do I fix the P0112 code on a 2014 GMC Sierra?

Start by inspecting the IAT sensor wiring and connectors for damage or corrosion. If the wiring is intact, the sensor may need to be replaced. Clear the code and test the system after repairs.

6. Where is the IAT sensor located on a 2014 GMC Sierra?

The IAT sensor is typically located near the air intake system, often in the air filter housing or along the intake tubing.

7. How much does it cost to fix a P0112 code on a 2014 GMC Sierra?

The repair cost can vary. Replacing the IAT sensor typically costs $50-$150, while fixing wiring issues may cost more depending on the complexity.

8. Can a dirty air filter cause the P0112 code on a 2014 GMC Sierra?

A dirty air filter is unlikely to directly cause this code, but it can contribute to poor air intake readings. Ensure the air filter is clean before diagnosing further.

9. What tools are needed to diagnose a P0112 code on a 2014 GMC Sierra?

You’ll need an OBDII scanner to read and clear codes, a multimeter to check voltage and continuity, and basic hand tools to access the sensor and wiring.

10. Does the P0112 code affect emissions on a 2014 GMC Sierra?

Yes, an incorrect intake air temperature reading can affect the air-fuel mixture, potentially increasing emissions and causing the vehicle to fail an emissions test.