AutoCodes – GMC – P0070 2018 GMC Sierra

P0070 2018 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 2018 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 185

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 P0070 2018 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 2018 GMC Sierra - Ambient Air Temperature Sensor Circuit - AutoCodes.com — P0070 2018 GMC Sierra Code - Ambient Air Temperature Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC P0070 2018 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 2018 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 2018 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 2018 GMC Sierra 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 P0070 2018 GMC Sierra Code

1. What is OBDII code P0070 for a 2018 GMC Sierra?

- OBDII code P0070 for a 2018 GMC Sierra relates to the Ambient Air Temperature Sensor Circuit.

2. What are common symptoms of OBDII code P0070 in a 2018 GMC Sierra?

- Common symptoms of OBDII code P0070 in a 2018 GMC Sierra include inaccurate temperature readings on the dashboard, issues with the climate control system, and potential impact on engine performance.

3. What are the possible causes of OBDII code P0070 in a 2018 GMC Sierra?

- Possible causes of OBDII code P0070 in a 2018 GMC Sierra include a faulty ambient air temperature sensor, damaged wiring or connectors in the sensor circuit, or issues with the sensor's calibration.

4. How can I diagnose OBDII code P0070 in my 2018 GMC Sierra?

- To diagnose OBDII code P0070 in a 2018 GMC Sierra, you can use a scan tool to read the code and check the ambient air temperature sensor's readings for accuracy. Inspecting the sensor, wiring, and connectors for damage is also recommended.

5. Can I drive my 2018 GMC Sierra with OBDII code P0070?

- It is generally safe to drive your 2018 GMC Sierra with OBDII code P0070, but it is recommended to address the issue promptly to avoid potential problems with temperature readings and the climate control system.

6. How can I repair OBDII code P0070 in my 2018 GMC Sierra?

- Repairing OBDII code P0070 in a 2018 GMC Sierra may involve replacing the ambient air temperature sensor, repairing or replacing damaged wiring or connectors, and ensuring proper calibration of the sensor.

7. Is it possible to reset OBDII code P0070 in a 2018 GMC Sierra?

- OBDII codes like P0070 can be reset using a scan tool, but it is important to address the underlying issue causing the code before resetting it to prevent the problem from recurring.

8. How does the ambient air temperature sensor affect the performance of a 2018 GMC Sierra?

- The ambient air temperature sensor in a 2018 GMC Sierra helps provide accurate temperature readings for the climate control system and engine management, ensuring optimal performance and efficiency.

9. Can a faulty ambient air temperature sensor cause other issues in a 2018 GMC Sierra?

- Yes, a faulty ambient air temperature sensor in a 2018 GMC Sierra can cause issues with the climate control system, inaccurate temperature readings, and potentially impact engine performance and fuel efficiency.

10. How much does it typically cost to repair OBDII code P0070 in a 2018 GMC Sierra?

- The cost to repair OBDII code P0070 in a 2018 GMC Sierra can vary depending on the cause of the issue and labor rates, but it may involve parts and labor costs for sensor replacement, wiring repairs, or calibration adjustments.