AutoCodes – Ford – P2459 Ford

P2459 Ford Code - Diesel Particulate Filter Regeneration Frequency

Quick Answer

The particulates in the exhaust gases are collected by the Diesel Particulate Filter (DPF). Common causes include Exhaust leak, Improperly installed or loose Exhaust Gas Temperature (EGT), Low engine compression. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

What it means: P2459 Ford indicates Diesel Particulate Filter Regeneration Frequency.
Common causes: Common causes include Exhaust leak, Improperly installed or loose Exhaust Gas Temperature (EGT), Low engine compression.
Severity: Moderate - service should be scheduled soon.
Can I drive?: The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.

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Code Popularity 47,992

How popular is this code, among other codes? Medium

Repair Importance Level

Moderate (Service soon) (2 / 3)

Repair Difficulty Level

Intermediate (2 / 3)

What is this?

Table of contents Created and updated by William Orellana on Jul 29, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
Comments
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Code P2459 Ford Description

The particulates in the exhaust gases are collected by the Diesel Particulate Filter (DPF). When the filter becomes saturated with particulates, they are incinerated by a regeneration process. The regeneration process increases the exhaust gas temperature, warning the Diesel Oxidation Catalyst (DOC) first, the warning the DPF. The Engine Control Module (ECM) monitors the system with inputs from two Exhaust Gas Temperature (EGT) sensors 1 and 2 and the exhaust differential pressure sensor.

OBDII Code P2459 Ford - Diesel Particulate Filter Regeneration Frequency - AutoCodes.com — P2459 Ford Code - Diesel Particulate Filter Regeneration Frequency

What does this mean?

What are the Possible Causes of the DTC P2459 Ford?

Exhaust leak
Improperly installed or loose Exhaust Gas Temperature (EGT)
Low engine compression
Corroded fuel injector
Water in the fuel system

How to Fix the DTC P2459 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 P2459 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.