P204F — AdBlue system: performance too low
Severity: Serious
Can you drive? With caution: limp mode possible, have it checked soon
Produttore: Tutti makes (OBD-II standard)
| Meaning | AdBlue dosing is not achieving the expected result. The ECU compares how much it injects with what the NOx sensors read and finds too large a gap. |
| Family | Powertrain (P) |
Typical symptoms
AdBlue Attenzione on the Pannello di Controllo
Countdown before No-start
Reduced Potenza
Countdown before No-start
Reduced Potenza
Common causes
Weak AdBlue pump oppure blocked Filtra
Partially obstructed injector
Unreliable downstream NOx sensor
Non-compliant fluid
Partially obstructed injector
Unreliable downstream NOx sensor
Non-compliant fluid
What a do
Measure actual pump delivery and check the injector: these are repairable faults, whereas replacing sensors by prova and Errore is the most expensive route and often pointless.
Domande Frequenti
What does code P204F mean?
AdBlue system: performance too low. AdBlue dosing is not achieving the expected result. The ECU compares how much it injects with what the NOx sensors read and finds too large a gap.
Can I keep driving with code P204F Attivo?
With caution: limp mode possible, have it checked soon
Common causes — P204F
Weak AdBlue pump oppure blocked Filtra Partially obstructed injector Unreliable downstream NOx sensor Non-compliant fluid
How do you fix code P204F?
Measure actual pump delivery and check the injector: these are repairable faults, whereas replacing sensors by prova and Errore is the most expensive route and often pointless.
Need Aiuto with this fault?
We are ECU specialists: diagnosis, file repair and remapping for Auto, bikes, Camion and Agricoli vehicles.
ContattaciRelated codes
- P2000 — NOx Trap Efficiency Below Threshold Bank 1
- P2001 — NOx Trap Efficiency Below Threshold Bank 2
- P2002 — Diesel particulate Filtra (DPF) clogged
- P2003 — Particulate Trap Efficiency Below Threshold Bank 2
- P2004 — Intake Manifold Runner Control Stuck aperti Bank 1
- P2005 — Intake Manifold Runner Control Stuck aperti Bank 2
- P2006 — Intake Manifold Runner Control Stuck Chiuso Bank 1
- P2007 — Intake Manifold Runner Control Stuck Chiuso Bank 2
- P2008 — Intake Manifold Runner Control Circuit/aperti Bank 1
- P2009 — Intake Manifold Runner Control Circuit Low Bank 1
- P200A — Component N15/3(ETC control module) is faulty.
- P200B — Component N15/3(ETC control module) is faulty.