P20E6

Reductant Injection Air Pressure Too Low

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
Increased fuel consumption
Possible transition to emergency mode
SCR error message on dashboard

Causes

Air leak in AdBlue injection system
Air pressure compressor malfunction
Clogged SCR system air filter
Problems with the air pressure sensor
Pressure control valve malfunction

How to Fix

Check the system for air leaks
Diagnose air pressure compressor
Check and, if necessary, replace the SCR air filter
Check the air pressure sensor readings
Check the operation of the pressure control valve

Related codes

P20E7 P20E8 P20E9