I had all the following codes come up on my ECU,
P0130 A/F Sensor (B1) or HO 2SI ( B1)
P1525 ASCD Functionor Consist MPX SIG CC/SL
P242F DPF Ash Accumalation
And on the OBD2,
P2425 DPF Restriction - Ash Accumalation
Instead of replacing sensors and the DPF what should the mechanic be looking for? What would cause all thes codes and block the DPF?
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