P2BAC

NOx Exceedence - Deactivation of EGR

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–167 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased fuel consumption
Unstable idling
Increased emissions of harmful substances

Causes

EGR valve malfunction
Dirty or clogged EGR system
Problems with NOx sensors
EGR control circuit malfunction
Software error in the control unit

How to Fix

Check the condition of the EGR valve
Clean or replace EGR system components
Check NOx sensors and their wiring
Diagnose the EGR control circuit
Update ECU software

Related codes

P0401 P0402 P0403