Easy one-page printout for the garage or repair shop
This summary uses the existing diagnostic information shown in full below.
This code means that the car's system is cleaning the soot filter too often. It's like a vacuum cleaner that keeps cleaning the same spot over and over again.
The code P2459 indicates that the diesel particulate filter (DPF) regeneration process is occurring more frequently than expected on Bank 1.
Diesel engines are equipped with a particulate filter to capture soot and other particles from the exhaust. Over time, this filter becomes clogged and needs to be cleaned through a process called regeneration. The P2459 code is triggered when the engine control module (ECM) detects that the regeneration process is happening too often, which could indicate an issue with the DPF system or related components.
• Check Engine Light is on
• Reduced engine performance
• Increased fuel consumption
• Faulty diesel particulate filter
• Issues with the exhaust gas recirculation (EGR) system
• Faulty temperature or pressure sensors
DPF: Diesel Particulate Filter
EGR: Exhaust Gas Recirculation
• Use an OBD-II scanner to confirm the code and check for other related codes.
• Inspect the diesel particulate filter for excessive soot buildup.
• Check the operation of the EGR system and related sensors.
• Replace or clean the diesel particulate filter.
• Repair or replace faulty sensors.
• Ensure proper functioning of the EGR system.
• OBD-II scanner
• Digital multimeter
• Pressure gauge
$300 - $1500
Moderate
• Ford F-Series
• Chevrolet Silverado
• Dodge Ram
• Regular maintenance of the DPF system.
• Use high-quality diesel fuel.
• Avoid short trips that prevent complete DPF regeneration.
Emission Control System Issue
• Drive at highway speeds periodically to help the DPF regenerate.
• Monitor fuel economy for signs of increased consumption.
Check with the vehicle manufacturer for warranty coverage on emission-related components.
This code has become more common with the increased use of diesel particulate filters in modern diesel engines.
Moderate – Addressing this issue can prevent further damage to the DPF and maintain vehicle performance.
Ignoring emission-related issues can lead to increased pollution and may not comply with local emission laws.
• Engine running at operating temperature
• Vehicle driven at highway speeds
The diesel particulate filter is located in the exhaust system, typically near the engine or under the vehicle.
Q: Can I drive with a P2459 code?
A: You can drive with this code, but it's best to address it soon to avoid potential damage to the DPF.
Q: What happens if I ignore the P2459 code?
A: Ignoring this code can lead to a clogged DPF, reduced engine performance, and increased fuel consumption.
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