AutoCodes – Chevrolet – P0072 2018 Chevrolet Silverado

P0072 2018 Chevrolet Silverado Code - Ambient Air Temperature Sensor Circuit Low Voltage

Quick Answer

The Engine Control Module (ECM) monitors the ambient air temperature sensor with a low reference circuit and signal circuit. Common causes include Faulty Ambient Air Temperature Sensor, Ambient Air Temperature Sensor harness is open or shorted, Ambient Air Temperature Sensor circuit poor electrical connection. 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 2018 Chevrolet Silverado indicates Ambient Air Temperature Sensor Circuit Low Voltage.
Common causes: Common causes include Faulty Ambient Air Temperature Sensor, Ambient Air Temperature Sensor harness is open or shorted, Ambient Air Temperature Sensor circuit poor electrical connection.
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 Popularity 453

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on May 16, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P0072 2018 Chevrolet Silverado Description

The Engine Control Module (ECM) monitors the ambient air temperature sensor with a low reference circuit and signal circuit. The ECM monitors the voltage drop across the sensor, which is inversely proportional to temperature. When the ambient air temperature is cold, the resistance of the sensor is high. When the ambient air temperature is warm, the resistance of the sensors is low. The engine control module converts the voltage value to a temperature value and sends the value to the Display Module via serial data. The Display Module displays the temperature. The Diagnostic Trouble Code (DTC) will be set when the ECM detects the Ambient Air Temperature Sensor signal is more than 88°C (190°F).

OBDII Code P0072 2018 Chevrolet Silverado - Ambient Air Temperature Sensor Circuit Low Voltage - AutoCodes.com — P0072 2018 Chevrolet Silverado Code - Ambient Air Temperature Sensor Circuit Low Voltage

What does this mean?

What are the Possible Causes of the DTC P0072 2018 Chevrolet Silverado?

Faulty Ambient Air Temperature Sensor
Ambient Air Temperature Sensor harness is open or shorted
Ambient Air Temperature Sensor circuit poor electrical connection
Faulty Engine Control Module (ECM)

How to Fix the DTC P0072 2018 Chevrolet Silverado?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0072 2018 Chevrolet Silverado code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the P0072 2018 Chevrolet Silverado code?

Need more information on how to fix the P0072 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals

Need Help with the Code?

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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 P0072 2018 Chevrolet Silverado Code

1. What are the common symptoms of OBDII code P0072 on a 2018 Chevrolet Silverado?

The common symptoms of OBDII code P0072 include inaccurate temperature readings on the vehicle's display, poor fuel efficiency, and potential issues with the vehicle's air conditioning system.

2. What does the Ambient Air Temperature Sensor do in a 2018 Chevrolet Silverado?

The Ambient Air Temperature Sensor in a 2018 Chevrolet Silverado measures the temperature of the air surrounding the vehicle. This information is used by the vehicle's computer to adjust various engine functions for optimal performance.

3. What are the possible causes of the Ambient Air Temperature Sensor Circuit Low Voltage code P0072 on a 2018 Chevrolet Silverado?

Possible causes of code P0072 on a 2018 Chevrolet Silverado include a faulty ambient air temperature sensor, damaged wiring or connectors in the sensor circuit, or issues with the vehicle's powertrain control module (PCM).

4. How can I diagnose the Ambient Air Temperature Sensor Circuit Low Voltage issue on my 2018 Chevrolet Silverado?

To diagnose the P0072 code, start by visually inspecting the sensor and its wiring for any signs of damage. Use a multimeter to test the sensor's resistance and voltage output. Additionally, scan the vehicle's computer for any related trouble codes.

5. Can I drive my 2018 Chevrolet Silverado with OBDII code P0072?

While it may be possible to drive your Silverado with the P0072 code, it is not recommended as it can lead to poor fuel efficiency and potential issues with the vehicle's overall performance. It is best to address the underlying problem as soon as possible.

6. How can I repair the Ambient Air Temperature Sensor Circuit Low Voltage issue on my 2018 Chevrolet Silverado?

Repairing the P0072 code may involve replacing the ambient air temperature sensor, repairing or replacing damaged wiring or connectors, or reprogramming the vehicle's PCM. It is recommended to consult a professional mechanic for an accurate diagnosis and repair.

7. Will resetting the OBDII code P0072 on my 2018 Chevrolet Silverado make it go away permanently?

Resetting the P0072 code may temporarily turn off the check engine light, but if the underlying issue is not addressed, the code is likely to reappear. It is important to diagnose and repair the root cause of the problem to prevent future occurrences.

8. How much does it cost to repair the Ambient Air Temperature Sensor Circuit Low Voltage issue on a 2018 Chevrolet Silverado?

The cost of repairing the P0072 code on a 2018 Chevrolet Silverado can vary depending on the cause of the issue, the extent of the repairs needed, and labor costs. It is advisable to obtain quotes from different mechanics or dealerships for an accurate estimate.

9. Can extreme weather conditions affect the Ambient Air Temperature Sensor Circuit on a 2018 Chevrolet Silverado?

Yes, extreme weather conditions such as extreme heat or cold can potentially affect the ambient air temperature sensor's performance, leading to false readings and triggering the P0072 code. It is essential to keep the sensor and its surroundings clean and free from debris.

10. How often should the Ambient Air Temperature Sensor be replaced on a 2018 Chevrolet Silverado?

The Ambient Air Temperature Sensor on a 2018 Chevrolet Silverado typically does not require frequent replacement unless it becomes faulty or damaged. Regular maintenance checks and prompt repair of any issues can help prolong the sensor's lifespan.