P23F5

Cylinder 4 Injector B Air-Fuel Ratio Imbalance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Unstable engine operation
Increased fuel consumption
Power Loss
Dips during acceleration
Check Engine Light Illuminates

Causes

Cylinder 4 injector malfunction
Injector contamination
Problems with the injector electrical circuit
Low fuel pressure
Engine control unit malfunction

How to Fix

Check the condition of the cylinder 4 injector
Clean or replace the injector if necessary
Check the injector electrical circuit
Check fuel pressure
Scan the engine control unit for errors

Related codes

P23F4 P23F6 P0171