P20D1

Exhaust Aftertreatment Fuel Injector B Control Circuit/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 fuel consumption
Problems with the exhaust gas cleaning system
Possible errors in other sensors of the exhaust cleaning system

Causes

Open or short circuit in the injector control circuit
Malfunction of the exhaust cleaning system injector
Problems with the relay or circuit fuse
Engine control unit malfunction
Oxidation of contacts in connectors

How to Fix

Check the integrity of the injector wiring and connectors
Check injector resistance (must meet specification)
Check the voltage at the injector connector
If necessary, replace the exhaust cleaning system injector
Check and, if necessary, reflash the engine control unit

Related codes

P20D0 P20D2 P20D3