P21E3

Cylinder 4 Injector B Circuit High

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Unstable engine idling
Increased fuel consumption
Reduced engine power
Possible misfire in cylinder 4
Check Engine Light Illuminates

Causes

Open injector control circuit
Poor contact in the injector connector
Malfunction of the injector itself
Wiring Harness Problems
Engine control unit malfunction

How to Fix

Check the resistance of injector B of cylinder 4
Inspect connectors and wires for damage
Check the integrity of the injector control circuit
If necessary, replace the injector
Check the operation of the engine control unit

Related codes

P21E2 P21E4 P0204