P21F2

Cylinder 12 Injector B Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Unstable engine operation
Power reduction
Increased fuel consumption
Misfire in cylinder 12
Check Engine Light Is On

Causes

Malfunction of the fuel injector of cylinder 12
Open or short circuit in control circuit
Poor contact in the injector connectors
Engine control unit malfunction
Problems with injector power supply

How to Fix

Check the resistance of the injector of cylinder 12
Inspect the wiring harness and connectors for damage.
Check the voltage in the injector control circuit
If necessary, replace the faulty injector
Scan the control unit for other errors

Related codes

P21F0 P21F1 P21F3