AutoCodesGMC – P0070 2017 GMC Sierra

P0070 2017 GMC Sierra Code - Ambient Air Temperature Sensor Circuit

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
P0070 2017 GMC Sierra indicates Ambient Air Temperature Sensor Circuit.
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 306
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on May 16, 2022
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Code P0070 2017 GMC Sierra 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 is not to factory specifications.
OBDII Code P0070 2017 GMC Sierra - Ambient Air Temperature Sensor Circuit - AutoCodes.com
P0070 2017 GMC Sierra Code - Ambient Air Temperature Sensor Circuit

What are the Possible Causes of the DTC P0070 2017 GMC Sierra?

  • 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 P0070 2017 GMC Sierra?

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 P0070 2017 GMC Sierra 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 P0070 2017 GMC Sierra code?

Need more information on how to fix the P0070 2017 GMC Sierra code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the P0070 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area

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 P0070 2017 GMC Sierra Code

1. What does the OBDII code P0070 mean on a 2017 GMC Sierra?

P0070 indicates an issue with the Ambient Air Temperature Sensor Circuit, which monitors the outside air temperature and sends data to the vehicle's computer.

2. What are the symptoms of a P0070 code on a 2017 GMC Sierra?

Common symptoms include inaccurate outside temperature readings, improper HVAC performance, or the check engine light turning on.

3. What causes the P0070 code on a 2017 GMC Sierra?

Possible causes include a faulty ambient air temperature sensor, damaged wiring or connectors, or a malfunction in the vehicle's computer.

4. Can I drive my 2017 GMC Sierra with a P0070 code?

Yes, but it’s recommended to address the issue promptly as it may affect the HVAC system's operation and overall driving comfort.

5. Where is the ambient air temperature sensor located on a 2017 GMC Sierra?

The sensor is typically located near the front grille or bumper area, where it can measure the outside air temperature accurately.

6. How do I fix the P0070 code on my 2017 GMC Sierra?

Inspect the ambient air temperature sensor and its wiring for damage. Replace the sensor or repair damaged wiring if necessary. Clear the code and check if the issue persists.

7. How much does it cost to repair a P0070 code on a 2017 GMC Sierra?

Replacing the ambient air temperature sensor typically costs between $50 and $150, including parts and labor, depending on your location and service provider.

8. Can a P0070 code affect my 2017 GMC Sierra’s performance?

The code itself does not directly affect performance but may cause issues with the HVAC system, such as incorrect temperature regulation.

9. How do I clear the P0070 code on a 2017 GMC Sierra?

After repairing the issue, use an OBDII scanner to clear the code. If the problem is resolved, the code should not return.

10. Do I need a professional to fix a P0070 code on my 2017 GMC Sierra?

If you’re comfortable working with sensors and wiring, you can attempt the repair yourself. However, if the issue persists, consult a professional mechanic for diagnosis.

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