AutoCodes – Chevrolet – P0074 2015 Chevrolet Silverado

P0074 2015 Chevrolet Silverado Code - Ambient Air Temperature Sensor Circuit Intermittent

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: P0074 2015 Chevrolet Silverado indicates Ambient Air Temperature Sensor Circuit Intermittent.
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 334

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 P0074 2015 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 an unrealistic signal variance of the Ambient Air Temperature Sensor signal.

OBDII Code P0074 2015 Chevrolet Silverado - Ambient Air Temperature Sensor Circuit Intermittent - AutoCodes.com — P0074 2015 Chevrolet Silverado Code - Ambient Air Temperature Sensor Circuit Intermittent

What does this mean?

What are the Possible Causes of the DTC P0074 2015 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 P0074 2015 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 P0074 2015 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 P0074 2015 Chevrolet Silverado code?

Need more information on how to fix the P0074 2015 Chevrolet Silverado code? Get Access to Factory Service Manuals

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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 P0074 2015 Chevrolet Silverado Code

What does OBDII code P0074 mean for a 2015 Chevrolet Silverado?

OBDII code P0074 indicates an intermittent issue with the ambient air temperature sensor circuit, which measures the outside air temperature.

What are common symptoms of the P0074 code?

Symptoms may include inaccurate temperature readings, poor fuel economy, and potential issues with engine performance as the vehicle may adjust based on incorrect temperature data.

What could cause the P0074 code to trigger?

Possible causes include a faulty ambient air temperature sensor, damaged wiring or connectors in the sensor circuit, or issues with the engine control module (ECM).

How can I diagnose the P0074 code?

Start by visually inspecting the ambient air temperature sensor and its wiring for damage. Use a multimeter to check the sensor's resistance and compare it to specifications. Also, scan for other related codes.

What is the location of the ambient air temperature sensor on a 2015 Chevrolet Silverado?

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

Are there any temporary fixes for the P0074 code?

A temporary fix could involve checking and securing any loose or damaged wiring and connectors. However, it's essential to address the root cause for a permanent solution.

How much does it typically cost to repair the P0074 code?

Repair costs can vary widely, but replacing the ambient air temperature sensor usually ranges from $50 to $200, depending on labor rates and part costs.

Can I drive my Silverado with the P0074 code?

While you can drive the vehicle, it is not advisable, as the incorrect temperature readings may lead to poor fuel efficiency and other performance issues. It's best to diagnose and fix the problem as soon as possible.

Will clearing the code P0074 fix the problem?

Clearing the code may turn off the check engine light temporarily, but if the underlying issue isn't resolved, the code will likely return after a short period of driving.