AutoCodes – GMC – P0506 2017 GMC Sierra

P0506 2017 GMC Sierra Code - Idle Speed Low

Quick Answer

The Engine Control Module (ECM) is the control center for the Throttle Actuator Control (TAC) system. Common causes include Dirty Throttle Body, Intake air leak, Throttle Body misadjusted or damaged. 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: P0506 2017 GMC Sierra indicates Idle Speed Low.
Common causes: Common causes include Dirty Throttle Body, Intake air leak, Throttle Body misadjusted or damaged.
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 338

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 Jun 29, 2022

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code P0506 2017 GMC Sierra Description

The Engine Control Module (ECM) is the control center for the Throttle Actuator Control (TAC) system. The ECM determines the driver's intent based on input from the accelerator pedal position sensors, then calculates the appropriate throttle response based on the throttle position sensors. The Direct Current (DC) motor, located in the Throttle Body Assembly, drives the throttle blade. In order to decrease idle speed, along with spark and fuel delivery changes the ECM commands the throttle closed reducing air flow into the engine and the idle speed decreases. In order to increase idle speed, the ECM commands the throttle plate open allowing more air to pass the throttle plate. The Diagnostic Trouble Code (DTC) will be set when the actual idle speed is approximately 94 RPM lower than the desired idle speed.

OBDII Code P0506 2017 GMC Sierra - Idle Speed Low - AutoCodes.com — P0506 2017 GMC Sierra Code - Idle Speed Low

What does this mean?

What are the Possible Causes of the DTC P0506 2017 GMC Sierra?

Dirty Throttle Body
Intake air leak
Throttle Body misadjusted or damaged
Faulty Electric Throttle Actuator Motor (Located in the Throttle Body Assembly)
Electric Throttle Actuator Motor harness is open or shorted
Electric Throttle Actuator Motor circuit poor electrical connection

How to Fix the DTC P0506 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 does this mean?

Code Tech Notes

If there are no intake leaks, clean the throttle body, adjust the engine idle, and clear the engine code. If the code persists you must replace the Electric Throttle Actuator Motor (Located in the Throttle Body Assembly).

The Engine Control Module (ECM) learns the idle position of the throttle plate to ensure the correct idle. Anytime the throttle body is cleaned or replaced, the ECM must learn the new throttle position. The idle may be unstable or a DTC may be set if the throttle position is not learned.

Chevrolet Throttle Body Cleaning and Idle Learning Procedure

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the P0506 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 P0506 2017 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 P0506 2017 GMC Sierra Code

1. What does code P0506 mean on a 2017 GMC Sierra?

P0506 indicates that the engine's idle speed is lower than the manufacturerâ€™s specified range.

2. What are the common symptoms of code P0506 in a GMC Sierra?

Symptoms include rough idling, engine stalling, decreased fuel efficiency, and potential hesitation during acceleration.

3. What causes P0506 on a 2017 GMC Sierra?

Common causes include a dirty throttle body, vacuum leaks, a faulty idle air control valve, or issues with the engine control module (ECM).

4. Can a dirty throttle body trigger code P0506?

Yes, carbon buildup in the throttle body can restrict airflow and lower the idle speed, triggering P0506.

5. How do you fix code P0506 on a GMC Sierra?

Start by cleaning the throttle body, checking for vacuum leaks, inspecting the idle air control system, and updating the ECM software if needed.

6. Is it safe to drive a 2017 GMC Sierra with code P0506?

It may be safe to drive short distances, but prolonged driving with a low idle speed can lead to stalling and unsafe driving conditions.

7. How do I check for vacuum leaks causing P0506?

Inspect vacuum hoses for cracks or disconnections and use a smoke test to detect leaks in the intake system.

8. Can resetting the ECM clear P0506?

Resetting the ECM can temporarily clear the code, but if the underlying issue isnâ€™t fixed, the code will return.

9. How much does it cost to repair code P0506 on a 2017 GMC Sierra?

Repair costs vary depending on the issue, ranging from $50 for throttle body cleaning to $300 or more for replacing parts like the idle air control valve.

10. Will cleaning the mass airflow sensor fix P0506?

If the mass airflow sensor is dirty and misreading airflow, cleaning it may help resolve the code, but itâ€™s not always the root cause.