P21D1

Cylinder 3 Injector B Circuit/Open

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–67 (est.)

Symptoms

Uneven engine operation
Increased fuel consumption
Reduced engine power
Check Engine Light Is On
Possible misfire in cylinder 3

Causes

Open or short circuit in the injector circuit
Cylinder 3 injector malfunction
Problems with the injector connector
Engine control unit malfunction
Wiring harness damage

How to Fix

Check the resistance of the injector of cylinder 3
Inspect wiring and connectors for damage
Check for voltage at the injector
Replace the faulty injector if necessary
Reset the error code and check if it returns

Related codes

P21D0 P21D2 P0203