AutoCodesChevrolet – P0070 2018 Chevrolet Silverado

P0070 2018 Chevrolet Silverado 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 Chevrolet Silverado 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 322
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 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 is not to factory specifications.
OBDII Code P0070 2018 Chevrolet Silverado - Ambient Air Temperature Sensor Circuit - AutoCodes.com
P0070 2018 Chevrolet Silverado Code - Ambient Air Temperature Sensor Circuit

What are the Possible Causes of the DTC P0070 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 P0070 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 P0070 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 P0070 2018 Chevrolet Silverado code?

Need more information on how to fix the P0070 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 P0070 2018 Chevrolet Silverado Code

1. What does the OBDII code P0070 mean in a 2018 Chevrolet Silverado?

The P0070 code indicates an issue with the Ambient Air Temperature Sensor Circuit, which monitors the temperature outside the vehicle.

2. What are the common symptoms of the P0070 code in a 2018 Chevrolet Silverado?

Symptoms may include an incorrect outside temperature reading on the dashboard, issues with the HVAC system, or poor fuel efficiency.

3. What causes the P0070 code in a 2018 Chevrolet Silverado?

Common causes include a faulty ambient air temperature sensor, damaged wiring or connectors, or a malfunctioning control module.

4. Where is the ambient air temperature sensor located on a 2018 Chevrolet Silverado?

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

5. Can I drive my 2018 Chevrolet Silverado with the P0070 code?

Yes, the vehicle can still be driven, but the HVAC system or other features relying on temperature readings may not function properly.

6. How do I fix the P0070 code in my 2018 Chevrolet Silverado?

Fixes include inspecting and repairing damaged wires or connectors, cleaning or replacing the ambient air temperature sensor, or recalibrating the control module.

7. How can I test the ambient air temperature sensor in my 2018 Chevrolet Silverado?

You can use a multimeter to check the sensor’s resistance and compare it to the manufacturer’s specifications for the current temperature.

8. How much does it cost to fix the P0070 code on a 2018 Chevrolet Silverado?

The cost depends on the issue, but replacing the ambient air temperature sensor typically costs $50-$150, plus labor if done by a mechanic.

9. Can a dirty sensor cause the P0070 code on a 2018 Chevrolet Silverado?

Yes, dirt or debris on the sensor can interfere with its readings and trigger the P0070 code.

10. Will clearing the P0070 code fix the problem on my 2018 Chevrolet Silverado?

Clearing the code may temporarily turn off the check engine light, but the underlying issue must be resolved to prevent the code from returning.

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