Fault Code Lookup › Powertrain codes › P2459
P2459 Powertrain · generic range, no listed definition
P2459 fault code: what 9 owners reported
P2459 sits in the generic powertrain range (engine, transmission, fuel and emissions), but its SAE definition is not in CarHooq's list, so this page shows only what owners reported. What it meant in practice is below, from 9 complaints owners filed with NHTSA. Updated November 9, 2026.
- 9owner reports
- 5car models
- 0mention a crash
- 0mention a fire
- 2017–2024model years
Which cars get code P2459?
Every model whose owners mentioned P2459 in a complaint, most reports first. Each year opens that car's full problem report. Popular models collect more reports because more of them are on the road.
Where does P2459 show up?
By brand
- Ram7
- Chevrolet2
Component the owner filed it under
Is there a recall for P2459?
The others concern the component owners file this code under (Fuel/Propulsion System) on the same cars; they may or may not relate to the code. Recall repairs are free; check your VIN at nhtsa.gov/recalls.
Fuel System, Diesel: Storage: Tank Assembly General Motors, LLC (GM) is recalling certain 2021 Cadillac Escalade, 2021, 2023-2024 Chevrolet Tahoe, and 2022 and 2024 GMC Yukon vehicles equipped with a 6-cylinder diesel engine. The original fuel tank may have been replaced with an incorrect fuel tank, which can allow fuel to leak in a rollover…
2021 Chevrolet Tahoe. Full risk and remedy on each car's report.
Fuel System, Diesel: Delivery: Fuel Pump Chrysler (FCA US, LLC) is recalling certain 2014-2020 Jeep Grand Cherokee, and 2014-2019 Ram 1500 vehicles equipped with 3.0L diesel engines. A high pressure fuel pump (HPFP) failure may introduce internal debris into the fuel system, potentially resulting in fuel starvation.
2017 Ram 1500. Full risk and remedy on each car's report.
Fuel System, Gasoline: Delivery: Fuel Pump: Control/Drive Module General Motors, LLC (GM) is recalling certain 2021 Cadillac Escalade, Escalade ESV, Chevrolet Suburban, Tahoe, GMC Yukon, and Yukon XL vehicles. The fuel pump power control module may cause the fuel pump to fail or operate intermittently, which can interrupt fuel flow to the engine, and cause an…
2021 Chevrolet Tahoe. Full risk and remedy on each car's report.
Fuel System, Gasoline: Storage: Tank Assembly General Motors, LLC (GM) is recalling certain 2021 Chevrolet Tahoe and GMC Yukon vehicles. The fuel tank assemblies may be missing adhesive between two layers of the fuel tank shell which may result in a fuel leak.
2021 Chevrolet Tahoe. Full risk and remedy on each car's report.
Fuel System, Gasoline: Delivery: Fuel Pump General Motors LLC (GM) is recalling certain 2015-2018 GMC Canyon, 2016-2017 Buick Envision, 2016-2018 Chevrolet Colorado and Malibu, 2017-2018 GMC Acadia, 2018 Buick LaCrosse, Cadillac ATS, Chevrolet Equinox, and GMC Terrain vehicles. The high pressure fuel pump may detach from its mounting flange…
2018 Chevrolet Equinox. Full risk and remedy on each car's report.
Fuel System, Gasoline: Storage: Tank Assembly Chrysler (FCA US LLC) is recalling certain 2017 Ram 1500 trucks. The fuel tanks in the affected vehicles may have a broken fuel tank control valve which might leak fuel if the vehicle were to become inverted. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle…
2017 Ram 1500. Full risk and remedy on each car's report.
What happened when owners saw P2459?
9 of the 9 reports, spread across the models above, as the owners wrote them. NHTSA removes names and VINs; long reports are trimmed. CarHooq has not verified individual claims.
The truck has a CEL P2459. The unit was taken back to the dealer on June 15, 2026, and they diagnosed an aftermarket air cleaner and regeneration. The CEL continued to display P2459, and I returned the truck to the dealer on 9/23. The dealer stated I had a defective air cleaner housing and was willing to pay 80% of the cost. They also said the restriction likely caused the DPF filter to plug because it caused excessive DPF generation. I believe this defective air housing may be on multiple units since these are likely purchased in batches. Ram should replace all air cleaner housings from the manufacturer batch related to my unit. They should also cover any parts caused by this defective air…
The vehicle has experienced repeated failures related to the diesel emissions system despite multiple repair attempts. The primary symptom is an illuminated check engine light accompanied by diagnostic trouble code P2459 (Diesel Particulate Filter Regeneration Frequency). The vehicle frequently enters regeneration cycles and continues to exhibit the same symptoms after major emissions system repairs. The emissions system components, including the Diesel Particulate Filter (DPF) and related DEF system components, were previously replaced by an authorized dealer. Following those repairs, the same warning light and fault code returned. The vehicle was subsequently inspected by another…
Purchased the car on 10/20/2023. Since that time it had 7 check engine lights with the P2459 code for Diesel Particulate Filter Regeneration Frequency. The car has powered down 3 times and been repaired several times, for things NOT that code. The vehicle is currently powered down at the dealership where purchased, as I attempt to mediate repairs and costs. I have spent $9398.73 in repairs, Uber’s, rentals, car payments, and warranty payments. And, I am still without a working vehicle.
Service engine light came on, took it to Chevrolet dealership (2 months outside warranty). They found p2459 for regeneration frequency, performed necessary dpf regeneration procedure and was successful in completing and regeneration event, applied smoke to exhaust system for testing purposes and found large exhaust leak at rear tail pipe connection necessary to install new graphite seal and clamp. Also, found coolant leak at rear of engine on passenger side, upon further inspection found egr cooler coolant hose's actively leaking. necessary to replace hose's at this time. They do not want to release the vehicle back to us for “safety” reasons, while a part has been back ordered for 6 weeks…
TL* THE CONTACT OWNS A 2017 RAM 1500. WHILE DRIVING 70 MPH, THE CHECK ENGINE WARNING INDICATOR ILLUMINATED AND THE VEHICLE FAILED TO ACCELERATE PAST 30 MPH. TRI-LIVES MOTORS (180 STATE HWY F, BRANSON, MO 65616, (417) 334-7543) DIAGNOSED THE VEHICLE AND FOUND CODE NUMBERS: P0299 (SUPERCHARGER UNDERBOOST) AND P2459 (DIESEL PARTICULATE FILTER REGENERATION FREQUENCY). THE CODES WERE RESET AND THE MASTER AIR FLOW WAS REPLACED. THE CONTACT WAS INFORMED TO DRIVE THE VEHICLE. AFTER DRIVING 100 MILES, THE CHECK ENGINE WARNING INDICATOR ILLUMINATED. THE CONTACT CALLED THE SAME DEALER AND WAS INFORMED TO DRIVE THE VEHICLE AND TAKE IT TO A NEARBY DEALER IF IT LOST POWER. THE VEHICLE WAS TAKEN BACK TO…
Excessive Diesel Exhaust Regeneration. Vehicle in in regeneration about 72% of the time. Check engine light comes on about every 2 weeks with code P2459. The P2459 code indicates an issue with the diesel particulate filter (DPF) regeneration frequency in diesel vehicles. This code is triggered when the powertrain control module (PCM) detects that the DPF regeneration process has not occurred as expected. Have to take to dealership for a manual regeneration and to clear the code. Dealership says this is a known issue for Ram Diesel engines from 2018-2024. Dealership says Ram has yet to address the issue even though its been 7 years since the issue started in the 2018 model year. Been dealing…
DPF regeneration frequency. Truck began exhaust regeneration at frequent intervals. Truck produced check engine light for "regen frequency P2459". Problem verified by dealer. Cause of the issue is unknown.
My 2022 RAM 3500 has repeated failures of the diesel particulate filter (DPF) system. The truck enters limp mode unexpectedly, including while towing on the interstate, creating a serious safety hazard due to sudden loss of power. Since purchasing the vehicle, I have experienced ongoing issues with the emissions system, specifically related to the DPF. The check engine light comes on frequently, and diagnostic scans consistently show code P2459 (Diesel Particulate Filter Regeneration Frequency Too High). The DPF system has been replaced approximately five times by authorized RAM dealer. Despite these repairs, the same problem continues to occur. The truck will sometimes enter limp mode…
Emission system failure. Code P2459 Regeneration Frequency. Overheating of the DPF while stuck in regen cycle causes burning smell and diesel fumes in the cabin while driving. Suspected vehicle on fire. Date of incident 01/25/2025. Vehicle at dealership for repair 01/28/2025. Dealership repair unsuccessful following STAR approved process of elimination. Vehicle returned to dealer 02/18/2025 for same issue. Many customers with 2019-2022 diesel engines having same issue. No known fix according to dealership.
P2459: questions drivers ask
What does code P2459 mean?
P2459 sits in the generic powertrain range (engine, transmission, fuel and emissions), but its SAE definition is not in CarHooq's list, so CarHooq shows only what owners reported. 9 owners reported it to NHTSA, most often for the Ram 3500 (4), Ram 2500 (2), Chevrolet Equinox (1); their reports describe what happened.
Which cars get code P2459 most often?
In NHTSA owner complaints, P2459 is mentioned most for the Ram 3500 (4), Ram 2500 (2), Chevrolet Equinox (1), across 5 models and model years 2017 to 2024. Popular models collect more reports because more of them are on the road.
Is there a recall for code P2459?
No NHTSA recall text names P2459 directly. 6 recalls on the cars that report this code concern the same component owners name most (Fuel/Propulsion System); they may or may not relate to the code. Check your VIN at nhtsa.gov/recalls.
What should I do if my car shows P2459?
Write down when the code appeared and what the car did (warning lights, loss of power, noises, speed, weather). Check your VIN for open recalls at nhtsa.gov/recalls, ask a dealer or independent workshop to read the stored freeze-frame data before anyone clears the code, and keep the repair order. If the car loses power in traffic, stop driving it. CarHooq does not diagnose: these are owner reports and official recall notices, not repair advice.
How this page was made
CarHooq read the text of every owner complaint filed with NHTSA for 19 US and European brands (model years 2012 onwards) and picked out the diagnostic trouble codes owners wrote down. This page lists every mention of P2459. The code is in a generic range but its standard definition is not in CarHooq's list, so CarHooq shows only what owners reported. Nothing here is a diagnosis. More answers: the fault code FAQ. Data: NHTSA Office of Defects Investigation (public domain), retrieved November 9, 2026. How CarHooq reports are made.
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