P0073 2016 GMC Sierra Code - Ambient Air Temperature Sensor Circuit High Voltage
Quick Answer
The P0073 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates a problem with the Ambient Air Temperature (AAT) sensor circuit registering a high voltage. Common causes include Faulty AAT Sensor: The most common cause of the P0073 code is a malfunctioning AAT sensor that is sending incorrect voltage signals to the ECM, Wiring Issues: Damaged or corroded wiring in the AAT sensor circuit can lead to high voltage readings and trigger the code, ECM Malfunction: A problem with the engine control module itself can also cause the AAT sensor circuit to report high voltage. 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
- P0073 2016 GMC Sierra indicates Ambient Air Temperature Sensor Circuit High Voltage.
- Common causes
- Common causes include Faulty AAT Sensor: The most common cause of the P0073 code is a malfunctioning AAT sensor that is sending incorrect voltage signals to the ECM, Wiring Issues: Damaged or corroded wiring in the AAT sensor circuit can lead to high voltage readings and trigger the code, ECM Malfunction: A problem with the engine control module itself can also cause the AAT sensor circuit to report high voltage.
- 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 P0073 2016 GMC Sierra Description
The P0073 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates a problem with the Ambient Air Temperature (AAT) sensor circuit registering a high voltage. The AAT sensor is responsible for measuring the temperature of the air surrounding the vehicle, which is crucial for the engine control module (ECM) to adjust fuel delivery and ignition timing. When the AAT sensor circuit reports a high voltage, it means that the ECM is receiving a signal indicating that the ambient air temperature is higher than it actually is. This can lead to incorrect fuel mixture adjustments, potentially causing poor engine performance, reduced fuel efficiency, and increased emissions.
Common Causes of P0073 2016 GMC Sierra
- Faulty AAT Sensor: The most common cause of the P0073 code is a malfunctioning AAT sensor that is sending incorrect voltage signals to the ECM.
- Wiring Issues: Damaged or corroded wiring in the AAT sensor circuit can lead to high voltage readings and trigger the code.
- ECM Malfunction: A problem with the engine control module itself can also cause the AAT sensor circuit to report high voltage.
- Poor Electrical Connections: Loose or poor electrical connections in the AAT sensor circuit can disrupt the voltage readings and trigger the code.
- Environmental Factors: Extreme temperatures or exposure to moisture can also affect the AAT sensor's performance and trigger the P0073 code.
Symptoms of P0073 2016 GMC Sierra
- Check Engine Light: The most common symptom associated with the P0073 code is the illumination of the check engine light on the vehicle's dashboard.
- Inaccurate Temperature Readings: The AAT sensor may provide incorrect temperature readings to the ECM, leading to erratic engine performance.
- Reduced Fuel Efficiency: Incorrect fuel mixture adjustments can result in decreased fuel efficiency, causing the vehicle to consume more fuel than necessary.
- Rough Idling: The engine may experience rough idling or hesitation when the AAT sensor circuit is malfunctioning.
- Emission Issues: The vehicle may fail emissions tests due to the incorrect air temperature readings affecting the emissions control system.
How to Fix P0073 2016 GMC Sierra
- Diagnose the Issue: Use a diagnostic scanner to retrieve the P0073 code and perform a thorough inspection of the AAT sensor and its circuit.
- Test the AAT Sensor: Check the AAT sensor's resistance and voltage output to determine if it is functioning correctly.
- Inspect Wiring and Connections: Check the wiring harness and connectors for any damage, corrosion, or loose connections that may be causing the high voltage readings.
- Replace AAT Sensor: If the AAT sensor is found to be faulty, replace it with a new sensor and ensure proper installation.
- Clear the Code: After repairing the issue, clear the P0073 code from the ECM's memory using a diagnostic scanner to reset the check engine light.
Cost to Fix P0073 2016 GMC Sierra
The typical repair costs for addressing the P0073 code on a 2016 GMC Sierra can vary depending on the specific cause of the issue. In general, the cost of replacing the Ambient Air Temperature sensor itself can range from $50 to $150, depending on the brand and quality of the sensor. Labor costs for diagnosing and repairing the issue can add an additional $100 to $200, based on the hourly rates of the auto repair shop. Overall, the total repair cost for resolving the P0073 code can range from $150 to $350, including parts and labor. It is advisable to consult with a qualified mechanic or auto repair shop to get an accurate estimate based on the specific circumstances of the vehicle.
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Frequently Asked Questions about P0073 2016 GMC Sierra Code
What does the OBDII code P0073 mean for a 2016 GMC Sierra?
P0073 indicates that the ambient air temperature sensor circuit is experiencing high voltage, which means the sensor or its circuit is malfunctioning.
What are the common symptoms of the P0073 code?
Common symptoms include inaccurate temperature readings, poor fuel economy, engine performance issues, and the check engine light being illuminated.
What could cause the P0073 code to trigger in a GMC Sierra?
Potential causes include a faulty ambient air temperature sensor, damaged wiring or connectors, short circuits, or issues with the Engine Control Module (ECM).
How can I diagnose the P0073 code?
Start by visually inspecting the ambient air temperature sensor and its wiring for damage. Use a multimeter to test the sensor's resistance and check for any voltage irregularities in the circuit.
Is it safe to drive with the P0073 code?
While it may not pose an immediate safety risk, driving with this code can lead to poor engine performance and decreased fuel efficiency, so it is advisable to address the issue promptly.
What repairs are commonly needed to fix the P0073 code?
Repairs may involve replacing the ambient air temperature sensor, fixing damaged wiring or connectors, or reprogramming or replacing the ECM if it is found to be faulty.
Can I clear the P0073 code, and will it come back?
You can clear the code using an OBDII scanner, but if the underlying issue is not resolved, the code will likely reappear.
How much does it typically cost to repair the P0073 code?
Repair costs can vary widely, but replacing the ambient air temperature sensor usually ranges from $100 to $300, depending on labor costs and parts prices.
Will the P0073 code affect my vehicle’s emissions?
Yes, a malfunctioning ambient air temperature sensor can affect fuel mixture and combustion efficiency, potentially leading to increased emissions.
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