P20DB

Exhaust Aftertreatment Fuel Supply Control Stuck Open

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Increased fuel consumption
Check Engine Light Illuminates
Reduced engine power
Unstable engine idling
Increased exhaust smoke

Causes

Fuel supply solenoid valve malfunction
Problems with wiring to the valve
Mechanical valve jamming
Engine control unit malfunction
Fuel system contamination

How to Fix

Check the condition of the fuel supply solenoid valve
Check the integrity of the wiring and connectors
Clean or replace a stuck valve
Check the operation of the fuel control system
Reset the error and run a test cycle of the engine

Related codes

P20DA P20DC P20DD