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P1A72 GMC Code - 14 Volt Power Module Temperature Sensor 2 Circuit Low Voltage

Quick Answer

The P1A72 diagnostic trouble code for GMC vehicles refers to the 14 Volt Power Module Temperature Sensor 2 Circuit registering a low voltage. Common causes include Faulty Temperature Sensor: The temperature sensor itself may be malfunctioning, causing it to register incorrect voltage readings, Wiring Issues: Corrosion, damage, or poor connections in the wiring harness connected to the sensor can disrupt the voltage signal, Power Module Malfunction: Problems with the power module itself can affect the sensor's readings and lead to a low voltage error code. 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
P1A72 GMC indicates 14 Volt Power Module Temperature Sensor 2 Circuit Low Voltage.
Common causes
Common causes include Faulty Temperature Sensor: The temperature sensor itself may be malfunctioning, causing it to register incorrect voltage readings, Wiring Issues: Corrosion, damage, or poor connections in the wiring harness connected to the sensor can disrupt the voltage signal, Power Module Malfunction: Problems with the power module itself can affect the sensor's readings and lead to a low voltage error code.
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 Aug 19, 2024
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Code P1A72 GMC Description

The P1A72 diagnostic trouble code for GMC vehicles refers to the 14 Volt Power Module Temperature Sensor 2 Circuit registering a low voltage. This sensor is crucial for monitoring the temperature of the power module, which helps regulate the power distribution within the vehicle's electrical system. When the sensor detects a low voltage, it can indicate issues with the power module's temperature regulation, potentially leading to overheating or other electrical malfunctions.

OBDII Code P1A72 GMC - 14 Volt Power Module Temperature Sensor 2 Circuit Low Voltage
P1A72 GMC Code - 14 Volt Power Module Temperature Sensor 2 Circuit Low Voltage

Common Causes of P1A72 GMC

  1. Faulty Temperature Sensor: The temperature sensor itself may be malfunctioning, causing it to register incorrect voltage readings.
  2. Wiring Issues: Corrosion, damage, or poor connections in the wiring harness connected to the sensor can disrupt the voltage signal.
  3. Power Module Malfunction: Problems with the power module itself can affect the sensor's readings and lead to a low voltage error code.
  4. Electrical System Issues: Other underlying issues within the vehicle's electrical system, such as a faulty ground connection, can impact the sensor's performance.

Symptoms of P1A72 GMC

  1. Check Engine Light: The most common symptom associated with this code is the illumination of the Check Engine Light on the dashboard.
  2. Reduced Power: The vehicle may experience a decrease in power or performance due to the power module not functioning optimally.
  3. Electrical Issues: Other electrical components in the vehicle, such as lights or accessories, may exhibit erratic behavior or malfunctions.
  4. Poor Fuel Economy: The vehicle may consume more fuel than usual due to the inefficient power distribution caused by the sensor's low voltage reading.

How to Fix P1A72 GMC

  1. Diagnose the Issue: Use a diagnostic scanner to retrieve the specific trouble code and pinpoint the exact cause of the low voltage reading.
  2. Inspect the Sensor: Check the temperature sensor for any visible damage or signs of malfunction. Replace if necessary.
  3. Check Wiring: Inspect the wiring harness connected to the sensor for any damage, corrosion, or loose connections. Repair or replace as needed.
  4. Test Power Module: Verify the functionality of the power module to ensure it is operating correctly and not causing the low voltage issue.
  5. Clear Codes: Once the repairs are completed, clear the trouble codes from the vehicle's computer and ensure the issue is resolved.

Cost to Fix P1A72 GMC

The cost of repairing a P1A72 diagnostic trouble code can vary depending on the specific cause of the issue and the labor rates in your area. On average, the repair costs for this problem can range from $150 to $400, including parts and labor. Keep in mind that diagnostic time and labor rates at auto repair shops may vary, so it's advisable to obtain a detailed estimate from a professional mechanic before proceeding with the repairs.

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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 P1A72 GMC Code

1. What are the common symptoms of OBDII code P1A72 in a GMC vehicle?

- Common symptoms include poor fuel economy, reduced engine performance, illuminated Check Engine light, and potential issues with the vehicle's hybrid system.

2. What does the OBDII code P1A72 GMC indicate?

- The code indicates a low voltage condition in the 14 Volt Power Module Temperature Sensor 2 circuit in the vehicle.

3. What are the possible causes of OBDII code P1A72 in a GMC vehicle?

- Possible causes include a faulty temperature sensor, damaged wiring or connectors in the sensor circuit, issues with the power module, or a problem with the vehicle's hybrid system.

4. How can I diagnose the cause of OBDII code P1A72 in my GMC vehicle?

- Diagnose by conducting a thorough inspection of the temperature sensor, checking the sensor circuit for any damage, testing the power module, and ensuring the hybrid system is functioning properly.

5. Can I drive my GMC vehicle with OBDII code P1A72?

- It is not recommended to drive the vehicle with this code present, as it can lead to further damage and potential safety hazards. It's best to address the issue promptly.

6. How can I repair OBDII code P1A72 in my GMC vehicle?

- Repair options include replacing the faulty temperature sensor, repairing any damaged wiring or connectors, addressing issues with the power module, and ensuring the hybrid system is functioning correctly.

7. Is it possible to reset OBDII code P1A72 in a GMC vehicle without fixing the underlying issue?

- While you can clear the code with an OBDII scanner, it will likely return if the root cause of the problem is not addressed. It's important to fix the issue to prevent further complications.

8. Can a DIY enthusiast fix OBDII code P1A72 in a GMC vehicle?

- Depending on your skill level and access to tools, some DIY enthusiasts may be able to address this code by following repair guides and using proper diagnostic equipment.

9. How much does it cost to repair OBDII code P1A72 in a GMC vehicle?

- The cost of repair can vary depending on the specific cause of the issue, parts needed, labor rates, and whether you choose to fix it yourself or take it to a professional mechanic.

10. Are there any preventive measures to avoid OBDII code P1A72 in a GMC vehicle?

- Regular maintenance, such as checking the hybrid system components and monitoring sensor performance, can help prevent issues that may trigger this code.

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