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Engine-Codes – GMC – P0112 2014 GMC Sierra

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

Quick Answer

The P0112 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the Intake Air Temperature (IAT) Sensor Circuit registering a low voltage. Common causes include Faulty IAT Sensor: The sensor itself may be malfunctioning, providing incorrect voltage readings to the ECM, Wiring Issues: Damaged or corroded wiring connecting the IAT sensor to the ECM can cause low voltage signals, Poor Electrical Connection: Loose or poor electrical connections at the sensor or ECM can disrupt voltage signals. 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 Faulty IAT Sensor: The sensor itself may be malfunctioning, providing incorrect voltage readings to the ECM, Wiring Issues: Damaged or corroded wiring connecting the IAT sensor to the ECM can cause low voltage signals, Poor Electrical Connection: Loose or poor electrical connections at the sensor or ECM can disrupt voltage signals.
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 16, 2024
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Code P0112 2014 GMC Sierra Description

The P0112 diagnostic trouble code (DTC) for a 2014 GMC Sierra indicates a problem with the Intake Air Temperature (IAT) Sensor Circuit registering a low voltage. The IAT sensor is a crucial component of the vehicle's engine management system, as it measures the temperature of the incoming air to the engine. This information is used by the engine control module (ECM) to adjust the air-fuel mixture for optimal combustion efficiency. When the ECM detects a low voltage from the IAT sensor circuit, it can lead to various performance issues and potentially cause long-term damage if left unresolved.

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

Common Causes of P0112 2014 GMC Sierra

  1. Faulty IAT Sensor: The sensor itself may be malfunctioning, providing incorrect voltage readings to the ECM.
  2. Wiring Issues: Damaged or corroded wiring connecting the IAT sensor to the ECM can cause low voltage signals.
  3. Poor Electrical Connection: Loose or poor electrical connections at the sensor or ECM can disrupt voltage signals.
  4. ECM Malfunction: A problem with the engine control module can also trigger the P0112 code.
  5. Intake Air Leaks: Air leaks in the intake system can affect the IAT sensor readings and trigger the code.

Symptoms of P0112 2014 GMC Sierra

  1. Check Engine Light: The most common symptom associated with the P0112 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Rough Idle: A malfunctioning IAT sensor can cause the engine to idle roughly or inconsistently.
  3. Poor Fuel Economy: Incorrect air-fuel mixture adjustments due to a faulty IAT sensor can lead to decreased fuel efficiency.
  4. Engine Stalling: In severe cases, the engine may stall or have difficulty starting due to incorrect temperature readings from the IAT sensor.

How to Fix P0112 2014 GMC Sierra

  1. Diagnose the Issue: Use a scan tool to read the DTC and verify the low voltage reading from the IAT sensor.
  2. Inspect Wiring and Connections: Check the wiring harness for any damage or corrosion, and ensure all connections are secure.
  3. Test the IAT Sensor: Test the IAT sensor using a multimeter to determine if it is functioning properly.
  4. Replace the IAT Sensor: If the sensor is faulty, replace it with a new one following manufacturer guidelines.
  5. Clear DTCs and Test Drive: Clear the DTC from the ECM memory, and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0112 2014 GMC Sierra

The typical repair costs for addressing a P0112 code on a 2014 GMC Sierra can range from $100 to $300, including parts and labor. However, specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It's recommended to check local rates for a more accurate estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.

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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.

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