P23F4

Cylinder 3 Injector B Air-Fuel Ratio Imbalance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$28–89 (est.)

Symptoms

Unstable engine operation at idle
Increased fuel consumption
Reduced engine power
Dips during acceleration
Check Engine Light Illuminates

Causes

Contamination or wear of the cylinder 3 injector
Problems with electrical wiring to the injector
Malfunction of the injector driver in the ECU
Low fuel pressure in the rail
Dirty fuel filters

How to Fix

Check the condition of the injector of cylinder 3
Test the resistance and integrity of the injector wiring
Check the fuel pressure in the system
Clean or replace fuel filters
If necessary, replace the faulty injector

Related codes

P23F3 P23F5 P0171