P20F6

Reductant Injection Valve Stuck Open Bank 1 Unit 1

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine light comes on
Reduced engine power
Increased consumption of reductant (AdBlue)
Unpleasant smell from the exhaust system
Possible SCR error messages on the dashboard

Causes

Mechanical jamming of the reducer valve
Contamination or crystallization of the reductant in the valve
Malfunction of the solenoid part of the valve
Problems with valve wiring or connectors
SCR control module malfunction

How to Fix

Diagnostics of the reductant injection valve
Cleaning or replacing the pressure reducer valve
Checking the condition of the reductant (AdBlue)
Checking the integrity of wiring and connectors
Reset error and test drive

Related codes

P20F7 P20F8 P20F9