P20D9

Exhaust Aftertreatment Fuel Supply Control Circuit Low

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–56 (est.)

Symptoms

Increased fuel consumption
Reduced engine power
Check Engine Light Illuminates
Increased level of harmful emissions
Unstable engine operation at idle

Causes

Open or short circuit in control circuit
Fuel sensor malfunction
Problems with the engine control unit
Solenoid valve malfunction
Wiring harness damage

How to Fix

Check the integrity of the control circuit
Check the operation of the fuel supply sensor
Check the condition of the solenoid valve
Check wiring harness for damage
Scan the engine control unit for errors

Related codes

P20DA P20DB P20DC