P23FA

Cylinder 9 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 dips
Check Engine Light Illuminates
Increased emissions of harmful substances

Causes

Cylinder 9 injector malfunction
Problems with the injector electrical circuit
Dirty or clogged nozzle
Low fuel pressure
Engine control unit malfunction

How to Fix

Check the condition and operation of the injector of cylinder 9
Check the electrical circuit of the injector for opens and shorts
Clean or replace the nozzle if necessary
Check the fuel pressure in the system
Test the engine control unit

Related codes

P23FB P23FC P23FD