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Engine-Codes – Generic – P2459

P2459 Code - Diesel Particulate Filter Regeneration Frequency

Quick Answer

The diagnostic trouble code P2459 indicates an issue with the diesel particulate filter (DPF) regeneration frequency in a vehicle's exhaust system. Common causes include Faulty DPF temperature sensors, Clogged diesel particulate filter, Exhaust leaks. 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 indicates Diesel Particulate Filter Regeneration Frequency.
Common causes
Common causes include Faulty DPF temperature sensors, Clogged diesel particulate filter, Exhaust leaks.
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.
What is this?
Table of contents Created and updated by William Orellana on Sep 16, 2024
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Code P2459 Description

The diagnostic trouble code P2459 indicates an issue with the diesel particulate filter (DPF) regeneration frequency in a vehicle's exhaust system. The diesel particulate filter is designed to trap and remove harmful particulate matter from the exhaust gases of a diesel engine. Over time, these particles accumulate in the filter, reducing its effectiveness and potentially causing blockages.

OBDII Code P2459 - Diesel Particulate Filter Regeneration Frequency
P2459 Code - Diesel Particulate Filter Regeneration Frequency

Common Causes of P2459

  1. Faulty DPF temperature sensors
  2. Clogged diesel particulate filter
  3. Exhaust leaks
  4. Malfunctioning engine control module
  5. Poor quality diesel fuel

Symptoms of P2459

  1. Decreased fuel efficiency
  2. Reduced engine power
  3. Increased emissions
  4. Engine misfires
  5. Stalling or rough idling

How to Fix P2459

  1. Diagnose the specific cause of the P2459 code using a diagnostic scanner.
  2. Inspect the DPF temperature sensors and replace any faulty sensors.
  3. Clean or replace the diesel particulate filter if it is clogged.
  4. Check for and repair any exhaust leaks in the system.
  5. Reset the engine control module and perform a forced regeneration to clear the DPF.

Cost to Fix P2459

The cost of repairing a P2459 code can vary depending on the specific cause of the issue and the vehicle's make and model. On average, the repair costs for addressing a diesel particulate filter regeneration frequency issue can range from $200 to $800, including parts and labor. However, it's important to note that labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. It's recommended to obtain quotes from local shops to get a more accurate estimate for your specific situation.

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Code P2459 Information for Specific Makes

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.

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