P2459 Dodge Code - Diesel Particulate Filter Regeneration Too Frequent
Quick Answer
The engine aftertreatment system monitors the soot load in the Diesel Particulate Filter. Common causes include Diesel Particulate Filter (DPF) Restricted, Faulty Diesel Particulate Filter, Fuel system or air handling system sensor failure. 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
- P2459 Dodge indicates Diesel Particulate Filter Regeneration Too Frequent.
- Common causes
- Common causes include Diesel Particulate Filter (DPF) Restricted, Faulty Diesel Particulate Filter, Fuel system or air handling system sensor failure.
- 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.
Code P2459 Dodge Description
What are the Possible Causes of the DTC P2459 Dodge?
- Diesel Particulate Filter (DPF) Restricted
- Faulty Diesel Particulate Filter
- Fuel system or air handling system sensor failure
- Base engine failure
- Fuel system failure
- Air handling system failure
How to Fix the DTC P2459 Dodge?
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 Dodge 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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Frequently Asked Questions about P2459 Dodge Code
1. What does the OBDII code P2459 mean on a Dodge vehicle?
P2459 indicates that the Diesel Particulate Filter (DPF) regeneration process is occurring more frequently than expected, which may point to a potential issue with the exhaust or emissions system.
2. What are the common symptoms of code P2459 on a Dodge?
Symptoms include reduced fuel efficiency, increased exhaust smoke, a potential check engine light, and sometimes a noticeable burning smell during frequent DPF regenerations.
3. What causes the P2459 code to appear on a Dodge?
Common causes include a clogged or malfunctioning DPF, a faulty exhaust gas temperature sensor, issues with the fuel injector, or excessive soot accumulation due to short driving cycles.
4. Can driving habits cause the P2459 code to trigger?
Yes, frequent short trips or low-speed driving can prevent the DPF from completing its regeneration process, leading to excessive soot buildup and more frequent regenerations.
5. How can I fix the P2459 code on my Dodge?
Repairs may involve cleaning or replacing the DPF, inspecting and replacing faulty sensors (like the exhaust gas temperature sensor), or addressing fuel system issues. Properly completing a manual or forced DPF regeneration may also resolve the issue.
6. Is it safe to drive with the P2459 code active?
While the vehicle may still be drivable, ignoring the code can lead to reduced performance, potential engine damage, or a completely clogged DPF, which may require costly repairs.
7. Does using poor-quality diesel fuel cause the P2459 code?
Yes, low-quality diesel fuel can increase soot production and clog the DPF, resulting in more frequent regenerations and triggering the P2459 code.
8. How much does it cost to repair the P2459 code on a Dodge?
Repair costs vary depending on the root cause, ranging from $100–$300 for sensor replacements to $1,000 or more for DPF cleaning or replacement.
9. Can a faulty exhaust gas temperature sensor trigger the P2459 code?
Yes, a malfunctioning exhaust gas temperature sensor can send incorrect readings to the ECU, leading to unnecessary or frequent DPF regenerations.
10. How can I prevent the P2459 code from recurring?
To prevent this code, use high-quality fuel, ensure regular maintenance, drive at highway speeds periodically to allow proper DPF regeneration, and address issues like sensor faults promptly.
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