AutoCodes – GMC – P00AF 2018 GMC Sierra

P00AF 2018 GMC Sierra Code - Turbocharger Boost Control Module Performance

Quick Answer

The smart variable geometry turbocharger actuator detects internal faults including pattern errors, motor overcurrent errors, and checksum errors. Common causes include Faulty Turbocharger Vane Position Actuator, Turbocharger Vane Position Actuator harness is open or shorted, Turbocharger Vane Position Actuator 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: P00AF 2018 GMC Sierra indicates Turbocharger Boost Control Module Performance.
Common causes: Common causes include Faulty Turbocharger Vane Position Actuator, Turbocharger Vane Position Actuator harness is open or shorted, Turbocharger Vane Position Actuator 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 235

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 15, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code P00AF 2018 GMC Sierra Description

The smart variable geometry turbocharger actuator detects internal faults including pattern errors, motor overcurrent errors, and checksum errors. The Diagnostic Trouble Code (DTC) will be set when the smart variable geometry turbo actuator has detected an internal malfunction for greater than 5 s.

OBDII Code P00AF 2018 GMC Sierra - Turbocharger Boost Control Module Performance - AutoCodes.com — P00AF 2018 GMC Sierra Code - Turbocharger Boost Control Module Performance

What does this mean?

What are the Possible Causes of the DTC P00AF 2018 GMC Sierra?

Faulty Turbocharger Vane Position Actuator
Turbocharger Vane Position Actuator harness is open or shorted
Turbocharger Vane Position Actuator circuit poor electrical connection

How to Fix the DTC P00AF 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 P00AF 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 P00AF 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 P00AF 2018 GMC Sierra Code

1. What does OBDII code P00AF mean on a 2018 GMC Sierra?

P00AF indicates an issue with the Turbocharger Boost Control Module's performance, which regulates the turbocharger's operation to maintain proper boost pressure.

2. What are common symptoms of code P00AF in a 2018 GMC Sierra?

Symptoms include reduced engine performance, poor acceleration, diminished fuel economy, excessive black smoke from the exhaust, and the Check Engine Light turning on.

3. What causes the P00AF code to appear on a GMC Sierra?

Common causes include a malfunctioning turbocharger boost control module, a stuck or damaged wastegate actuator, wiring or connector issues, or a failing turbocharger.

4. Can I drive my 2018 GMC Sierra with the P00AF code?

While you may be able to drive the vehicle, it could experience reduced performance and potentially cause further damage to the turbocharger or engine. It's best to address the issue promptly.

5. How do you diagnose the P00AF code on a GMC Sierra?

A mechanic will use an OBDII scanner to confirm the code, inspect the turbocharger and boost control module, check for wiring or connector issues, and perform tests on the wastegate actuator.

6. How can the P00AF code be fixed on my 2018 GMC Sierra?

Repairs may involve replacing the turbocharger boost control module, repairing or replacing damaged wiring or connectors, cleaning or replacing the wastegate actuator, or servicing the turbocharger.

7. Is the turbocharger always the problem with P00AF?

No, the issue could stem from the boost control module, wiring, connectors, or the wastegate actuator, so thorough diagnosis is essential before replacing the turbocharger.

8. How much does it cost to fix a P00AF code on a 2018 GMC Sierra?

Repair costs vary depending on the root cause. Replacing a boost control module may cost $300-$600, while turbocharger repairs or replacements could exceed $1,000.

9. Can a dirty air filter cause the P00AF code on a GMC Sierra?

While unlikely, a severely clogged air filter can restrict airflow, potentially affecting turbocharger performance. It's worth inspecting the air filter during diagnosis.

10. What preventive maintenance can help avoid the P00AF code?

Regularly inspecting and maintaining the turbocharger system, replacing the air filter as needed, and addressing Check Engine Light issues promptly can help prevent this code.