P204F

Reductant System Performance Bank 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
SCR system malfunction message appears
Increased fuel consumption
Unpleasant exhaust smell

Causes

Low level or poor quality of AdBlue reagent
Reagent system pump malfunction
Clogged reagent injection nozzle
Problems with the system's electrical circuit
Malfunction of SCR system sensors

How to Fix

Check AdBlue level and quality
Diagnose the operation of the reagent pump
Clean or replace the injection nozzle
Check electrical circuit and connections
Scan the system for other fault codes

Related codes

P204E P2050 P20EE