P21E0

Cylinder 3 Injector B Circuit Low

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$28–89 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Power Loss
Misfire in cylinder 3
Check Engine Light Is On

Causes

Open or short circuit in the injector circuit
Cylinder 3 injector malfunction
Connector problems or contact corrosion
Engine control unit malfunction
Wiring harness damage

How to Fix

Check the integrity of the injector control circuit
Test injector resistance
Inspect connectors and contacts for damage
If necessary, replace the injector
Check the operation of the engine control unit

Related codes

P21E1 P0203 P0266