P246B
Sistema
Powertrain (Diesel Emissions)
Escáner necesario
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).

Síntomas habituales

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

Causas típicas

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

¿Qué escáner necesita?

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

Use datos en vivo y freeze frame antes de cambiar piezas. Códigos ABS, SRS y U suelen requerir un escáner de todos los sistemas.

Consejos de diagnóstico

  • Registre el freeze frame cuando se active el código
  • Borre el código solo tras corregir la causa
  • Revise códigos pendientes relacionados
  • Verifique que la batería esté por encima de 12,4 V antes de sospechar sensores

Escáneres FOXWELL recomendados

Preguntas frecuentes

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.