P2BAA

NOx Exceedence - Low Reagent Consumption

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–89 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Low AdBlue level message appears
Unpleasant exhaust smell

Causes

Low level of AdBlue reagent in the tank
SCR pump malfunction
Clogged reagent injection nozzle
Problems with NOx sensors
Poor quality or diluted reagent

How to Fix

Check and, if necessary, add AdBlue reagent
Diagnose the operation of the SCR system pump
Clean or replace the reagent injection nozzle
Check NOx sensors and their wiring
Reset error and test drive

Related codes

P20EE P2201 P229F