P20A3

Reductant Purge Control Valve A Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased consumption of AdBlue reagent
Unpleasant smell from the exhaust system
Activating emergency engine operation

Causes

Short circuit in valve circuit
Reagent purge valve malfunction
Wiring harness damage
Problems with the SCR control unit
Corrosion of contacts or connectors

How to Fix

Check the integrity of wiring and connectors
Test the resistance of the reagent purge valve
Check control circuit voltage
Replace faulty valve if necessary
Reset the error and check the system after repair

Related codes

P20A0 P20A1 P20A2