P0072 2017 GMC Sierra Code - Ambient Air Temperature Sensor Circuit Low Voltage
Quick Answer
The P0072 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates an issue with the Ambient Air Temperature (AAT) sensor circuit registering low voltage. Common causes include Faulty Ambient Air Temperature Sensor: The AAT sensor itself may be malfunctioning, causing it to send incorrect voltage signals to the ECM, Wiring Issues: Damaged or corroded wiring connections between the AAT sensor and the ECM can disrupt the voltage signal, ECM Malfunction: A problem with the engine control module can prevent it from accurately interpreting the voltage signals from the AAT sensor. 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
- P0072 2017 GMC Sierra indicates Ambient Air Temperature Sensor Circuit Low Voltage.
- Common causes
- Common causes include Faulty Ambient Air Temperature Sensor: The AAT sensor itself may be malfunctioning, causing it to send incorrect voltage signals to the ECM, Wiring Issues: Damaged or corroded wiring connections between the AAT sensor and the ECM can disrupt the voltage signal, ECM Malfunction: A problem with the engine control module can prevent it from accurately interpreting the voltage signals from the AAT sensor.
- 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 P0072 2017 GMC Sierra Description
The P0072 diagnostic trouble code (DTC) for a 2017 GMC Sierra indicates an issue with the Ambient Air Temperature (AAT) sensor circuit registering low voltage. The AAT sensor is responsible for measuring the temperature of the air outside the vehicle and relaying this information to the engine control module (ECM). This data is crucial for the ECM to adjust fuel delivery, ignition timing, and other parameters to optimize engine performance and efficiency.
Common Causes of P0072 2017 GMC Sierra
- Faulty Ambient Air Temperature Sensor: The AAT sensor itself may be malfunctioning, causing it to send incorrect voltage signals to the ECM.
- Wiring Issues: Damaged or corroded wiring connections between the AAT sensor and the ECM can disrupt the voltage signal.
- ECM Malfunction: A problem with the engine control module can prevent it from accurately interpreting the voltage signals from the AAT sensor.
- Sensor Placement: If the AAT sensor is positioned in a location where it is exposed to heat sources or other external factors, it may provide inaccurate readings.
- Environmental Factors: Extreme temperatures or weather conditions can impact the performance of the AAT sensor, leading to low voltage readings.
Symptoms of P0072 2017 GMC Sierra
- Check Engine Light: The most common symptom associated with the P0072 code is the illumination of the Check Engine Light on the vehicle's dashboard.
- Inaccurate Temperature Readings: The vehicle's temperature gauge may display incorrect readings or fluctuate unexpectedly.
- Poor Fuel Economy: The engine may experience decreased fuel efficiency due to incorrect air temperature readings affecting fuel delivery.
- Climate Control Issues: The vehicle's climate control system may not function properly, leading to inconsistent heating or cooling inside the cabin.
How to Fix P0072 2017 GMC Sierra
- Diagnose the Issue: Use a diagnostic scanner to retrieve the DTC and perform a thorough inspection of the AAT sensor, wiring, and connections.
- Replace the Ambient Air Temperature Sensor: If the sensor is faulty, replace it with a new one that meets the manufacturer's specifications.
- Check Wiring Connections: Inspect the wiring harness for any damage or corrosion, and repair or replace as needed.
- Clear the DTC: After completing the repair, clear the DTC from the ECM memory using the diagnostic scanner to reset the Check Engine Light.
- Test Drive: Take the vehicle for a test drive to ensure that the issue has been resolved and that the AAT sensor is providing accurate readings to the ECM.
Cost to Fix P0072 2017 GMC Sierra
The cost of repairing a P0072 code on a 2017 GMC Sierra can vary depending on the specific cause of the issue and the cost of parts and labor in your area. On average, the cost of replacing the Ambient Air Temperature Sensor and addressing any wiring issues can range from $100 to $300. Additional costs may apply if the ECM needs to be replaced or reprogrammed. It is recommended to consult with a qualified mechanic or auto repair shop to obtain an accurate estimate based on your vehicle's specific needs and location. Labor rates at auto repair shops typically range from $80 to $150 per hour, but rates may vary based on the shop's location and expertise.
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Frequently Asked Questions about P0072 2017 GMC Sierra Code
1. What does OBDII code P0072 mean on a 2017 GMC Sierra?
P0072 indicates that the Ambient Air Temperature Sensor Circuit is reading a low voltage, which may result in incorrect temperature readings.
2. What are the symptoms of code P0072 in a 2017 GMC Sierra?
Symptoms may include an inaccurate outside temperature display, poor HVAC system performance, or the check engine light turning on.
3. What causes the P0072 code in a 2017 GMC Sierra?
Common causes include a faulty ambient air temperature sensor, damaged wiring, corroded connectors, or a short circuit in the sensor's circuit.
4. Can I drive my 2017 GMC Sierra with a P0072 code?
Yes, you can generally drive the vehicle, but the HVAC system may not function properly, and the check engine light may stay on.
5. How do I fix the P0072 code on my 2017 GMC Sierra?
Fixes may include replacing the ambient air temperature sensor, repairing or replacing damaged wiring, or cleaning corroded connectors.
6. Where is the ambient air temperature sensor located on a 2017 GMC Sierra?
The ambient air temperature sensor is typically located near the front grille, close to the radiator or bumper.
7. How do I test the ambient air temperature sensor on a 2017 GMC Sierra?
You can test the sensor using a multimeter to check for proper resistance or voltage readings compared to manufacturer specifications.
8. What tools are needed to repair a P0072 code?
Common tools include a multimeter, basic hand tools, and possibly a scan tool to clear the code after repairs.
9. Will the P0072 code clear itself after fixing the issue?
In some cases, the code may clear itself after several drive cycles, but it's recommended to use a scan tool to clear it immediately.
10. Can extreme weather cause the P0072 code to appear?
Yes, extreme cold or heat can sometimes impact the ambient air temperature sensor, triggering the code if the sensor or wiring is already compromised.
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