P244B: Diesel Particulate Filter Differential Pressure Too High (Bank 1)

Ką reiškia P244B?

P244B means the differential pressure across the diesel particulate filter is higher than the ECU expects, indicating the filter is heavily loaded with soot. The most common cause is a DPF that has failed to complete its passive regeneration cycle because the vehicle is driven mostly on short urban trips. Less commonly, the pressure sensor itself is reading high, the DPF substrate has melted or cracked internally, or there is a downstream exhaust restriction.

P244B yra su emisijos susijęs diagnostikos gedimų kodas, klasifikuojamas kaip high sunkumo. Kai jūsų automobilio valdymo blokas aptinka šią būklę, jis išsaugo P244B ir uždega variklio kontrolės lemputę.

Kokie yra P244B simptomai?

Jei jūsų automobilis suaktyvino P244B, galite pastebėti vieną ar kelis iš šių simptomų:

• Check engine light
• Noticeable loss of power and slow throttle response
• DPF warning light or message on dash
• Engine running rough at idle or under load
• Black smoke from exhaust under acceleration
• Fuel economy drops by 10 to 20 percent
• On severe blockage: limp mode (engine power reduced to 50 percent or less)

Kas sukelia P244B?

Čia pateikiamos dažniausios P244B priežastys, surikiuotos pagal tikimybę:

Ar saugu važiuoti su P244B?

Paprastai taip, trumpam laikotarpiui. Drivable in the short term, but treat as a priority repair. A heavily clogged DPF restricts exhaust flow, causes loss of power, can damage the turbocharger, and on some vehicles triggers limp mode after several drive cycles. Repair within days, not weeks.

Kaip diagnozuojamas P244B?

Atlikite šiuos žingsnius, kad nustatytumėte pagrindinę P244B priežastį:

1. Read live data: DPF soot mass (grams), distance since last regeneration, count of completed regenerations, and current differential pressure. A soot mass above 30 to 40 grams with no recent regeneration confirms the filter is overloaded
2. Before any parts replacement, attempt a forced regeneration with a scan tool that supports it (most independent garages have this capability). A successful forced regen drops the soot mass to under 5 grams and can resolve P244B without further repair, especially on a vehicle that has been driven on short trips
3. If forced regeneration fails or the soot mass refuses to drop, the DPF is either physically damaged or so loaded that off-vehicle cleaning is needed. Off-vehicle cleaning takes 1 to 2 days at a specialist and saves 60 to 80 percent versus DPF replacement
4. Compare the differential pressure reading to manufacturer specification at idle. A reading that is high at idle but normal under load points to a faulty sensor rather than a clogged filter. The sensor is far cheaper to replace than the DPF
5. Inspect the DPF substrate with a borescope through the inlet flange. A cracked or melted substrate is visible and cannot be cleaned, only replaced. Catastrophic regeneration events (often after a misfire or rich condition) destroy the substrate
6. Confirm there is no downstream restriction by checking the exhaust system from DPF outlet to tailpipe. A collapsed muffler or crushed pipe section will mimic a clogged DPF

Kiek kainuoja P244B remontas?

Remonto kaštai P244B priklauso nuo pagrindinės priežasties ir jūsų automobilio. Čia pateikiamos tipinės sąmatos:

P244B konkrečiose transporto priemonėse

P244B elgiasi skirtingai priklausomai nuo jūsų automobilio. Pasirinkite savo automobilį žemiau, kad matytumėte modeliui būdingas priežastis, žinomas problemas ir pakoreguotas kaštų sąmatas:

Susiję diagnostikos kodai

Šie kodai dažnai pasirodo kartu su P244B arba rodo susijusias problemas:

Dažni klausimai apie P244B

Skaitykite mūsų išsamius vadovus