P20F7

Reductant Injection Valve Stuck Open Bank 2 Unit 1

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$50–167 (est.)

Symptoms

Increased consumption of AdBlue reagent
Check Engine Light Illuminates
Reduced engine power
Unpleasant smell from the exhaust system
Possible SCR error messages

Causes

Mechanical valve jamming
Reagent valve dirty
Electrical wiring problems
SCR control module malfunction
Low quality AdBlue reagent

How to Fix

Check the condition of the reagent injection valve
Clean or replace a stuck valve
Check the integrity of the wiring harness and connectors
Check the operation of the SCR control module
Reset the error and test the SCR system

Related codes

P20F6 P20F8 P20EE