AutoCodes – Generic – P00AF

P00AF Code - Turbocharger/Supercharger Boost Control 'A' Module Performance

Quick Answer

The Variable Geometry Turbocharger (VGT) is electronically activated by the Electronic Turbo actuator. Common causes include Faulty Electronic Turbo actuator, Electronic Turbo actuator harness is open or shorted, Electronic Turbo 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 indicates Turbocharger/Supercharger Boost Control 'A' Module Performance.
Common causes: Common causes include Faulty Electronic Turbo actuator, Electronic Turbo actuator harness is open or shorted, Electronic Turbo 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 36,425

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
Comments
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Code P00AF Description

The Variable Geometry Turbocharger (VGT) is electronically activated by the Electronic Turbo actuator. The Electronic Turbo actuator is a smart device and receives information from the Engine Control Module (ECM). The Electronic Turbo actuator performs its own diagnostics and reports failures back to the ECM. The ECM then decodes the error message and converts it to a fault code. This fault code is logged when the Electronic Turbo actuator detected an internal error within the Electronic Turbo actuator. The Electronic Turbo actuator will stop controlling the turbocharger when this fault code is active. The ECM lights the MIL lamp after the diagnostic runs and fails in two consecutive drive cycles. The ECM turns off the MIL lamp after the diagnostic runs and passes in 4 consecutive drive cycles

OBDII Code P00AF - Turbocharger/Supercharger Boost Control 'A' Module Performance - AutoCodes.com — P00AF Code - Turbocharger/Supercharger Boost Control 'A' Module Performance

What does this mean?

What are the Possible Causes of the DTC P00AF?

Faulty Electronic Turbo actuator
Electronic Turbo actuator harness is open or shorted
Electronic Turbo actuator circuit poor electrical connection

How to Fix the DTC P00AF?

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 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.

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Information for Specific Makes

P00AF Buick — Turbocharger Boost Control Module Performance
P00AF Cadillac — Turbocharger Boost Control Module Performance
P00AF Chevrolet — Turbocharger Boost Control Module Performance
P00AF Dodge — Turbocharger/Supercharger Boost Control 'A' Module Performance
P00AF GMC — Turbocharger Boost Control Module Performance

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.