P21EF

Cylinder 10 Injector B Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$33–167 (est.)

Symptoms

Uneven engine operation
Increased fuel consumption
Misfire in cylinder 10
Check Engine Light Illuminates
Reduced engine power

Causes

Cylinder 10 injector malfunction
Open or short circuit in control circuit
Poor contact in the injector connector
Engine control unit malfunction
Wiring harness damage

How to Fix

Check the resistance of the injector of cylinder 10
Inspect the control circuit for damage
Check the contacts in the injector connector
Test the operation of the injector driver in the ECU
If necessary, replace the nozzle or repair the wiring

Related codes

P21EE P21F0 P21F1