Emissions control: EGR, DPF, catalytic converter and AdBlueGeneric OBD-II codeUrgency: Garage soon
Code P2458: particulate filter regeneration duration
P2458 means: diesel particulate filter: regeneration duration.[1] The diesel particulate filter (DPF) collects soot from the exhaust and removes it by burning it off in regenerations, which the ECU starts when the sensors show the filter has filled up. If that cleaning is interrupted, HELLA warns that very serious engine damage could result.[2]
What code P2458 means
The diesel particulate filter (DPF) collects soot from the exhaust and removes it by burning it off in regenerations, which the ECU starts when the sensors show the filter has filled up. If that cleaning is interrupted, HELLA warns that very serious engine damage could result.[2]
P2458 is the code the standard titles "Diesel Particulate Filter Regeneration Duration": it has to do with how long the filter's regeneration lasts. The sources consulted give only that title; they do not explain the criteria each manufacturer uses to set it.[1]
As a reference for how long a regeneration lasts, Wikipedia says that you usually need to drive continuously at about 80-100 km/h for 30 to 45 minutes every few hundred kilometres of urban use, and Diariomotor explains that a constant engine speed is needed, normally above 2,000 rpm, with the engine at operating temperature.[3][4]
Its sister code is P2459 ("Diesel Particulate Filter Regeneration Frequency"), which refers to how often regeneration occurs: according to CarParts, it is set when the exhaust pressure does not reach the necessary levels or when passive regeneration does not take place at the scheduled intervals.[5]
It is a generic OBD-II code (it starts with P2), so it means the same on any brand; what changes from one car to another is the most likely cause.[6]
Original definition (SAE J2012): Diesel Particulate Filter Regeneration Duration[1]
Causes of P2458
From most to least likely, according to the sources.
- 1Regenerations that are never completed or are interrupted. Diariomotor points out that the conditions for regenerating are not met if the car only does short city trips or is driven in a way that overuses the high gears, and Wikipedia and RACE agree that exclusively urban use or short trips cause the filter the most problems. No source expressly attributes this cause to P2458: it is the reason they give for a regeneration not being completed.[3][4][7]
- 2Faulty filter pressure sensor or damaged wiring, which distort the information the ECU uses. CarParts lists them among the causes of the sister code P2459, and RACE includes a faulty differential pressure sensor among the usual faults of the anti-pollution system.[5][7]
- 3Blocked filter or exhaust, or excess soot caused by engine problems, which CarParts mentions for P2459.[5]
- 4ECU fault, which CarParts also includes among the causes of P2459.[5]
Symptoms
- Particulate filter warning light on or flashing. According to HELLA, if it does not go out, the regeneration cannot be completed.[2]DPF warning light: faults that cause it
- Other warning lights in the instrument cluster, which CarParts mentions for the sister code P2459.[5]
- Weaker acceleration and poorer engine performance.[3][5]Less power: faults that cause it
- The car may go into limp mode with limited power, to avoid damage to the engine and the turbo.[3][5]Limp mode: faults that cause it
- If the filter ends up heavily loaded with soot, the car may jerk when accelerating.[4]Jerking: faults that cause it
- Black smoke from the exhaust if the filter is struggling.[4]Black smoke: faults that cause it
How to diagnose P2458
In order: from the most likely and cheapest to check to the most expensive.
- 1Read the codes with a diagnostic tool and check the sensors before clearing anything: RACE insists that clearing the code without repairing the cause only hides it for a while. CarParts recommends a professional diagnosis, because this generic code varies by manufacturer and testing the filter requires specific equipment and knowledge.[5][7]
- 2Think about how the car is used. If it mostly does short trips, take a long drive at a sustained engine speed and see whether the light goes out: Diariomotor talks about more than 2,000 rpm and Wikipedia about 80-100 km/h for 30 to 45 minutes, so follow what your car's manual says. If the light stays on or flashes, do not keep trying: HELLA recommends going to a garage straight away.[2][3][4]
- 3Check the filter pressure sensor, its intake pipes, the wiring and the connectors, which CarParts lists among the causes of the sister code P2459.[5]
- 4At the garage, ask them to check the soot load and force a regeneration with the diagnostic tool. For a struggling filter, Diariomotor mentions forced regeneration, professional ultrasonic cleaning and, as a last resort, replacing the filter.[4]
Can I keep driving with P2458?
Garage soon
The sources consulted do not rate the severity of P2458 specifically. On the particulate filter in general, HELLA warns that, if the cleaning is interrupted, very serious engine damage could result, and that, if the warning light does not go out or flashes, you must go to a garage straight away. RACE advises against driving in limp mode, because it increases the pressure and temperature in the exhaust and can damage other components. This is not a fault to ignore.[2][7]
Documented faults related to P2458
Known faults of specific engines and cars, with their repair cost, the affected years and their sources.
Particulate filter (DPF/FAP): the most serious faults by engine and car
- High severityVery frequentFrequency: Very frequentOM651EGR and particulate filter clogging, and emissions software updatesThe particulate filter and EGR clog up with short journeys, as on any diesel with these systems. In addition, Germany's KBA required software updates on several models with this engine between 2018 and 2021 because of a function that reduced EGR outside a temperature range.Repair (garage): €800–€2,500
- High severityCommonFrequency: Common1.3 MultijetIncomplete particulate filter regenerations and oil dilutionIn heavy urban use, with short journeys that do not let the particulate filter regeneration finish, unburnt diesel passes into the sump and dilutes the oil; the level can rise on the dipstick and the oil loses its ability to lubricate. Repeated many times, it speeds up engine wear.
- High severityCommonFrequency: Common2.0 HDiDPF clogging on additive-type systems (Eolys/cerine)The additive-type diesel particulate filter (DPF) of the 2.0 HDi clogs relatively easily on short journeys, especially on the 107/110 and 136-140 hp versions. The anti-pollution warning light comes on and, if ignored, the car loses power and may end up needing a new DPF.
- High severityCommonFrequency: Common1.6 and 2.0 MultiJet IISaturated diesel particulate filter (DPF) from incomplete regenerationsIn urban use with short journeys, the particulate filter does not manage to complete its regeneration and becomes saturated; garages recommend a weekly motorway run to avoid it. The filter itself is among the weak points flagged in the 1.6 and 2.0 MultiJet II after a certain mileage.
Engine sensors: the most serious faults by engine and car
- High severityOccasionalFrequency: Occasional2.0 DTI and 2.2 DTIVP44 injection pump and air mass meter failureGerman Wikipedia documents recurring failures of the Bosch VP44 injection pump and the air mass meter in the early years of this engine. An owner testimony for this engine describes the pump being replaced at 192,500 km, at a cost the owner calls «prohibitive».
- Medium severityCommonFrequency: Common2.0 TDIClogged particulate filter or faulty pressure sensorThe 2.0 TDI's particulate filter clogs if the car mostly makes short journeys, because it never gets to regenerate; sometimes the fault is just the differential pressure sensor. Cleaning it costs around €200 and replacing it, €800 to €3,000.Repair (garage): €800–€3,000
- Medium severityCommonFrequency: Common1.4 and 1.6 8vCrankshaft position sensor failure (TDC sensor)The crankshaft position sensor (capteur PMH, or TDC sensor) appears repeatedly in the reliability sources for the Clio II, the Kangoo I and the Dacia Logan I with this engine, with hard cold starting or stalling as the main symptoms. It is a cheap part, but the failure can leave you stranded.
- Medium severityCommonFrequency: Common1.4 and 1.6 16vCrankshaft position sensor failureThe crankshaft position sensor (capteur PMH) appears repeatedly in the reliability sources for almost every generation with this engine, with hard cold starting, stalling or the car cutting out unexpectedly. It is a cheap part, but the failure can leave you stranded.
Frequently asked questions
What does code P2458 mean?
The standard titles it "Diesel Particulate Filter Regeneration Duration", that is, the duration of the diesel particulate filter's regeneration. Regeneration is the process by which the ECU burns off the soot that has built up in the filter. The sources consulted do not detail under what conditions each manufacturer sets this code.[1][2][3]
What is the difference between P2458 and P2459?
P2458 refers to the duration of the regeneration and P2459 to its frequency. CarParts explains that P2459 is set when the exhaust pressure does not reach the necessary levels or when passive regeneration does not take place at the scheduled intervals.[1][5]
Can I drive with code P2458?
You can get to the garage, but it is not a good idea to keep using the car as usual. HELLA warns that interrupting the filter's cleaning can badly damage the engine and that, if the filter warning light does not go out or flashes, you must go to a garage straight away; RACE advises against driving in limp mode.[2][7]
How is the particulate filter regenerated?
Automatically. Passive regeneration takes place while driving when the exhaust gets hot enough; if it does not, active regeneration is started by the ECU, which adds fuel to the exhaust when the readings show the filter is full. According to Diariomotor, a constant engine speed (normally more than 2,000 rpm) and a warm engine are needed; if that is not achieved, it may have to be forced at the garage.[3][4]
Why does P2458 appear if I do short trips?
The sources do not expressly link short trips to P2458, but they do explain that regeneration needs the exhaust to get hot and stay hot for a good while, something that does not happen on short city trips. That is why Wikipedia and Diariomotor recommend getting out onto the open road at a sustained speed from time to time.[3][4]
Does P2458 mean the same on all brands?
Yes. Codes starting with P2 are generic OBD-II codes, with the same definition for all manufacturers; what varies from one engine to another is how and when the ECU sets it.[5][6]
Will I pass the MOT with code P2458?
If the code has switched on the engine warning light, no: with that light on, the inspection records a serious defect, and on Euro 5 and Euro 6 cars the ITV (Spain's roadworthiness inspection, similar to the MOT) also reads the OBD diagnostic system. Repair the fault before you go; clearing the code just before the inspection does not help either, because it counts as a serious defect.[8]
Not sure what is wrong with your car? Describe what you notice in the symptom diagnosis or see all fault codes.
Sources
Every fact on this page links to its source. If you find an error, let us know.
- 1.P2458 Trouble Code DefinitionDTCSearch.com (OBD Solutions) · Technical documentation · consulted 4 October 2026
- 2.El sistema DPF (Filtro de Partículas Diésel) - Boletín InformativoHELLA · Manufacturer · published 2015 · consulted 4 October 2026 · in Spanish
- 3.Diesel particulate filterWikipedia · Other source · consulted 4 October 2026
- 4.El filtro de partículas de mi coche no funciona, ¿qué puedo hacer?Diariomotor · Motoring press · published 21 November 2020 · consulted 4 October 2026 · in Spanish
- 5.P2459 Code: Diesel Particulate Filter Regeneration FrequencyCarParts.com · Technical documentation · published 19 June 2026 · consulted 4 October 2026
- 6.On-board diagnosticsWikipedia · Other source · consulted 4 October 2026
- 7.¿Qué es el sistema antipolución del coche y qué averías puede sufrir?RACE · Motoring press · published 25 September 2026 · consulted 4 October 2026 · in Spanish
- 8.Desmontando mitos: ¿puede pasar mi coche la ITV con el testigo de «avería motor» encendido?Diariomotor · Motoring press · published 8 March 2021 · consulted 2 October 2026 · in Spanish