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DPF warning and engine management light on Audi A4 2.0 TDI. Filter blocked and cannot complete regeneration cycle. This fault code is stored when the engine control unit detects a specific fault condition. Common causes include sensor failures, wiring faults, and component wear. Always read additional fault codes before replacing parts — multiple codes together provide a clearer diagnosis. Clear the code after repair and test drive to confirm the fault does not return.
Based on 0 driver confirmations
No commonly reported misdiagnoses for this fault yet. If you have replaced a part that did not fix this Audi problem, submit a wrong diagnosis report — it helps other drivers avoid the same costly mistake.
DPF kept blocking every few months. Regen kept failing. Root cause was the EGR valve was so carbon-fouled it was reducing exhaust temperatures needed for regen. Cleaned both EGR and DPF at the same time. Been 8 months, no DPF issues since.
Parts replaced: EGR cleaner, DPF cleaning service
DPF warning, auto regen wasn't completing. Took it to a specialist with VCDS who did a forced regeneration on the ramp. 45 minutes at elevated idle, DPF cleared completely. £60 for the session. Much cheaper than a new filter.
Parts replaced: None — forced regeneration
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