AutoCodes – Ford – P259F Ford

P259F Ford Code - Turbocharger 'A' Boost Control Position at High Limit

Quick Answer

This Diagnostic Trouble Code (DTC) will be set when the Variable Geometry Turbocharger (VGT) command is greater than a calibrated value for the current amount of boost pressure for more than a calibrated amount of time. Common causes include Intake air system leaks between the turbocharger and the intake manifold, Damaged Manifold Absolute Pressure (MAP) sensor, Turbocharger actuator is not responding. 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: P259F Ford indicates Turbocharger 'A' Boost Control Position at High Limit.
Common causes: Common causes include Intake air system leaks between the turbocharger and the intake manifold, Damaged Manifold Absolute Pressure (MAP) sensor, Turbocharger actuator is not responding.
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 604

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 May 09, 2024

Description
Possible Causes
How To Fix
Cost to Diagnose
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Code P259F Ford Description

This Diagnostic Trouble Code (DTC) will be set when the Variable Geometry Turbocharger (VGT) command is greater than a calibrated value for the current amount of boost pressure for more than a calibrated amount of time. The presence of this DTC may indicate that the vehicle is operating in degradation mode and may experience a loss of power. After repair, the vehicle may still display a system warning message. Drive the vehicle until the system warning message has cleared from the instrument cluster message center.

OBDII Code P259F Ford - Turbocharger 'A' Boost Control Position at High Limit - AutoCodes.com — P259F Ford Code - Turbocharger 'A' Boost Control Position at High Limit

What does this mean?

What are the Possible Causes of the DTC P259F Ford?

Intake air system leaks between the turbocharger and the intake manifold
Damaged Manifold Absolute Pressure (MAP) sensor
Turbocharger actuator is not responding
Variable Geometry Turbocharger (VGT) vanes sticking

How to Fix the DTC P259F Ford?

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 P259F Ford 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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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.