P20A1

Reductant Purge Control Valve A Performance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Check Engine light comes on
Increased reagent consumption (AdBlue)
Reduced engine power
Increased NOx emissions
Possible SCR error messages on the dashboard

Causes

Reagent purge valve jammed
Open or short circuit in control circuit
Valve contamination
Poor quality or freezing of the reagent
Problems with the SCR control unit

How to Fix

Check the condition and cleanliness of the valve
Check the valve control circuit for opens and shorts
Check valve coil resistance
Replace reagent purge valve if necessary
Check the quality and level of the reagent in the tank

Related codes

P20A0 P20A2 P20A3