P20A6

Reductant Injection Air Pressure Control Valve Circuit/Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Increased urea consumption
A message indicating a malfunction of the exhaust cleaning system appears
Increased NOx emissions

Causes

Open or short circuit in valve circuit
Pressure control solenoid valve malfunction
Problems with wiring harness or contacts
SCR control unit malfunction
Mechanical damage to air lines

How to Fix

Check the integrity of the valve wiring and connectors
Test valve resistance (usually 10-20 ohms)
Check the voltage supply to the valve when the ignition is turned on
Inspect air lines for damage
If necessary, replace the air pressure control valve

Related codes

P20A7 P20A8 P20A9