P2BA7

NOx Exceedence - Empty Reagent Tank

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$6–22 (est.)

Symptoms

Check Engine light comes on
Possible reduction in engine power
Dashboard message indicating low reagent level
Increased emissions of harmful substances
The car may go into emergency mode

Causes

Empty reagent tank (AdBlue)
Reagent level sensor malfunction
Problems with the reagent injection system
SCR system injector clogged
SCR system control module malfunction

How to Fix

Check the reagent level in the tank
If necessary, add reagent (AdBlue)
Check the operation of the reagent level sensor
Diagnose the reagent injection system
Check the SCR system injector for clogging
Reset the error after eliminating the cause

Related codes

P2BA8 P20EE P20E0