P246B
Sistema
Powertrain (Diesel Emissions)
Scanner richiesto
Full-system scanner (engine, ABS, SRS, transmission, service resets)

Diesel Particulate Filter Restriction — Ash Accumulation

Understand P246B, common causes, and the right FOXWELL scanner to diagnose it.

DPF ash load exceeded limit — filter nearing end of service life. Ash cannot be burned off by regen (unlike soot P2463).

Sintomi comuni

  • DPF warning
  • Frequent regen requests
  • Reduced power
  • May require DPF replacement

Cause tipiche

  • High-mileage DPF
  • Excessive oil consumption adding ash
  • Wrong engine oil type for diesel
  • Failed regens accelerating ash buildup

Quale scanner ti serve?

Full-system scanner (engine, ABS, SRS, transmission, service resets)

Usa dati live e freeze frame prima di sostituire componenti. I codici ABS, SRS e U richiedono spesso uno scanner mult sistema.

Consigli diagnostici

  • Registra il freeze frame quando il codice compare la prima volta
  • Cancella il codice solo dopo aver risolto la causa
  • Controlla i codici pending correlati
  • Verifica che la batteria sia sopra 12,4 V prima di sospettare un sensore

Scanner FOXWELL consigliati

Domande frequenti

Can I diagnose P246B with a basic code reader?
P246B may set in the engine module, but related diagnostics often benefit from an enhanced or full-system scanner with live data and freeze frame.
Is it safe to drive with P246B?
It depends on the code and symptoms. Flashing check engine lights and misfire codes should be addressed immediately. Consult a professional if unsure.