P21DF

Cylinder 2 Injector B Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–89 (est.)

Symptoms

Unstable engine operation
Power dips
Increased fuel consumption
Increased emissions
Check Engine Light Illuminates

Causes

Cylinder 2 injector malfunction
Open or short circuit in wiring harness
Poor contact in the injector connectors
Malfunction of the injector driver in the ECU
Contact corrosion

How to Fix

Check the resistance of the injector of cylinder 2
Inspect the wiring harness and connectors for damage.
Check the voltage on the injector circuit
Replace the injector if necessary
Test the operation of the ECU

Related codes

P21DD P21E0 P0202