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P0097 GMC Code - Intake Air Temperature Sensor 2 Circuit Low

Quick Answer

The P0097 diagnostic trouble code in a GMC vehicle indicates a problem with the Intake Air Temperature Sensor 2 Circuit being too low. Common causes include Faulty IAT Sensor: The IAT sensor itself may be defective and sending incorrect temperature readings to the ECM, Damaged Wiring or Connectors: Any damage to the wiring harness or connectors leading to the IAT sensor can disrupt the signal and trigger the P0097 code, Faulty ECM: A malfunctioning engine control module (ECM) may not be able to interpret the signals from the IAT sensor correctly. 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
P0097 GMC indicates Intake Air Temperature Sensor 2 Circuit Low.
Common causes
Common causes include Faulty IAT Sensor: The IAT sensor itself may be defective and sending incorrect temperature readings to the ECM, Damaged Wiring or Connectors: Any damage to the wiring harness or connectors leading to the IAT sensor can disrupt the signal and trigger the P0097 code, Faulty ECM: A malfunctioning engine control module (ECM) may not be able to interpret the signals from the IAT sensor correctly.
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 10, 2024
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Code P0097 GMC Description

The P0097 diagnostic trouble code in a GMC vehicle indicates a problem with the Intake Air Temperature Sensor 2 Circuit being too low. The Intake Air Temperature (IAT) sensor is responsible for monitoring the temperature of the air entering the engine. This information is crucial for the engine control module (ECM) to adjust the air-fuel mixture and ignition timing for optimal performance and fuel efficiency. When the IAT sensor detects a low voltage signal, it triggers the P0097 trouble code.

OBDII Code P0097 GMC - Intake Air Temperature Sensor 2 Circuit Low
P0097 GMC Code - Intake Air Temperature Sensor 2 Circuit Low

Common Causes of P0097 GMC

  1. Faulty IAT Sensor: The IAT sensor itself may be defective and sending incorrect temperature readings to the ECM.
  2. Damaged Wiring or Connectors: Any damage to the wiring harness or connectors leading to the IAT sensor can disrupt the signal and trigger the P0097 code.
  3. Faulty ECM: A malfunctioning engine control module (ECM) may not be able to interpret the signals from the IAT sensor correctly.
  4. Intake Air Temperature Sensor Circuit Issue: Problems within the circuit connecting the IAT sensor to the ECM can also cause the P0097 code.

Symptoms of P0097 GMC

  1. Check Engine Light: The most common symptom of the P0097 code is the illumination of the check engine light on the vehicle's dashboard.
  2. Poor Engine Performance: The engine may exhibit rough idling, hesitation, or a lack of power due to incorrect air-fuel mixture caused by the faulty IAT sensor.
  3. Decreased Fuel Efficiency: A malfunctioning IAT sensor can lead to decreased fuel efficiency as the engine may not be running at optimal parameters.
  4. Stalling: In severe cases, the engine may stall or have difficulty starting due to incorrect temperature readings from the IAT sensor.

How to Fix P0097 GMC

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the P0097 code and perform further testing to pinpoint the exact cause of the problem.
  2. Inspect Wiring and Connectors: Check the wiring harness and connectors for any damage, corrosion, or loose connections. Repair or replace as necessary.
  3. Test IAT Sensor: Test the IAT sensor using a multimeter to verify its functionality. Replace the sensor if it is faulty.
  4. Check ECM: Inspect the ECM for any signs of damage or malfunction. If necessary, reprogram or replace the ECM.
  5. Clear Codes and Test Drive: After completing the repairs, clear the trouble codes from the ECM memory and test drive the vehicle to ensure the issue has been resolved.

Cost to Fix P0097 GMC

The cost of repairing the Intake Air Temperature Sensor 2 Circuit Low issue can vary depending on the specific cause of the problem and the labor rates in your area. Generally, replacing the IAT sensor or repairing wiring/connectors can cost between $100 to $300, including parts and labor. If the ECM needs to be replaced, the cost can range from $500 to $1000 or more. Additional diagnostic fees and labor costs may apply, with total repair costs potentially exceeding $1000 in some cases. It is advisable to consult with a qualified mechanic or auto repair shop to obtain an accurate estimate based on your vehicle's make, model, and location.

What does this mean?

Tech Notes for P0097 GMC

The Intake Air Temperature (IAT) sensor 1, IAT sensor 2, Humidity sensor, MAF sensor, and BARO pressure sensor are integrated within the Mass Air Flow / Multifunction Intake Air Sensor.











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Information for Specific GMC Models

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 P0097 GMC Code

1. What are the common symptoms of OBDII code P0097 related to the Intake Air Temperature Sensor 2 Circuit Low in a GMC vehicle?

The common symptoms include poor engine performance, decreased fuel efficiency, rough idling, and potential stalling.

2. What could cause the Intake Air Temperature Sensor 2 Circuit Low code (P0097) to trigger in a GMC vehicle?

Possible causes include a faulty intake air temperature sensor, damaged wiring or connectors, a disconnected sensor, or a problem with the engine control module (ECM).

3. How can I diagnose the Intake Air Temperature Sensor 2 Circuit Low issue in my GMC vehicle?

You can diagnose the issue by using an OBDII scanner to retrieve the fault code, visually inspecting the sensor and its connections, and performing electrical tests to check for continuity and proper voltage.

4. Can I continue driving my GMC vehicle with the P0097 code related to the Intake Air Temperature Sensor 2 Circuit Low?

It is not recommended to drive the vehicle with this code as it can lead to further engine damage and poor performance. It is best to address the issue promptly.

5. What is the typical repair process for resolving the P0097 code in a GMC truck due to the Intake Air Temperature Sensor 2 Circuit Low?

The repair process usually involves replacing the faulty intake air temperature sensor, repairing or replacing damaged wiring or connectors, and clearing the fault code from the ECM.

6. Are there any DIY tips for fixing the Intake Air Temperature Sensor 2 Circuit Low code (P0097) in my GMC vehicle?

While some basic troubleshooting like checking connections can be done DIY, it is recommended to have a professional mechanic diagnose and repair the issue to ensure proper resolution.

7. How much does it cost to repair the Intake Air Temperature Sensor 2 Circuit Low issue causing the P0097 code in a GMC vehicle?

The cost of repair can vary depending on the exact cause of the issue, but it typically ranges from $100 to $300 for parts and labor.

8. Can a faulty Intake Air Temperature Sensor 2 affect the overall performance of a GMC vehicle?

Yes, a faulty sensor can impact the engine's air-fuel mixture, ignition timing, and overall performance, leading to issues like rough idling, decreased fuel efficiency, and potential stalling.

9. Is it necessary to reset the ECM after repairing the Intake Air Temperature Sensor 2 Circuit Low issue in a GMC vehicle?

Yes, it is recommended to clear the fault code and reset the ECM after repairing the issue to ensure that the system recognizes the new sensor and any related repairs.

10. How long does it take to repair the P0097 code related to the Intake Air Temperature Sensor 2 Circuit Low in a GMC vehicle?

The repair time can vary depending on the exact cause of the issue and the mechanic's efficiency, but it typically takes 1-2 hours to diagnose and repair the problem.

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