P20CF

Exhaust Aftertreatment Fuel Injector A Stuck Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$56–167 (est.)

Symptoms

Check Engine Light Is On
Reduced engine power
Increased AdBlue fluid consumption
Unpleasant exhaust smell
Errors in the operation of the exhaust gas cleaning system

Causes

Mechanical jamming of the injector due to urea crystallization
Fuel injector contamination
Worn or damaged injector
Problems with wiring or connectors
Malfunction of the control unit for the exhaust gas purification system

How to Fix

Diagnostics of the exhaust gas purification system
Checking the condition and operation of the fuel injector
Cleaning or replacing a stuck injector
Checking the control and power circuits of the injector
Reset error and test drive

Related codes

P20D0 P20EE P207F