AutoCodes – GMC – P0070 2015 GMC Sierra

P0070 2015 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 2015 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 239

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 2015 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 2015 GMC Sierra - Ambient Air Temperature Sensor Circuit - AutoCodes.com — P0070 2015 GMC Sierra Code - Ambient Air Temperature Sensor Circuit

What does this mean?

What are the Possible Causes of the DTC P0070 2015 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 2015 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 2015 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 2015 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 2015 GMC Sierra Code

1. What does the OBDII code P0070 mean on a 2015 GMC Sierra?

P0070 indicates an issue with the Ambient Air Temperature Sensor Circuit, which monitors outside air temperature for functions like climate control and engine performance adjustments.

2. What are the symptoms of the P0070 code on a 2015 GMC Sierra?

Common symptoms include inaccurate outdoor temperature readings, malfunctioning climate control, a Check Engine Light, or reduced fuel efficiency.

3. What causes the P0070 code to appear on a 2015 GMC Sierra?

Causes can include a faulty ambient air temperature sensor, damaged wiring or connectors, corrosion in the circuit, or a malfunctioning ECM (engine control module).

4. Can I drive my 2015 GMC Sierra with a P0070 code?

Yes, you can still drive with this code, but itâ€™s recommended to address it promptly as it can affect climate control and fuel economy.

5. How do I fix the P0070 code on a 2015 GMC Sierra?

Inspect the ambient air temperature sensor for damage, check wiring and connectors for corrosion or breaks, and replace the sensor if necessary.

6. Where is the ambient air temperature sensor located on a 2015 GMC Sierra?

The sensor is typically located near the front grille or bumper, exposed to outside air for accurate temperature measurement.

7. How much does it cost to repair the P0070 code on a 2015 GMC Sierra?

Repair costs can range from $50 to $200, depending on whether the sensor, wiring, or other components need replacement.

8. Can a P0070 code affect the climate control system?

Yes, a faulty ambient air temperature sensor can cause improper operation of the climate control system.

9. How can I diagnose the P0070 code on my 2015 GMC Sierra?

Use an OBDII scanner to confirm the code, then visually inspect the sensor and wiring, and test the sensor with a multimeter for proper voltage and resistance.

10. Will clearing the P0070 code solve the issue permanently?

Clearing the code may temporarily remove the Check Engine Light, but the issue will return unless the underlying problem is fixed.