P231F

Cylinder 12 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Unstable engine operation
Power reduction
Increased fuel consumption
Check Engine Light Illuminates
Increased vibrations at idle

Causes

Dirty or faulty fuel injectors
Problems with the ignition system (plugs, coils)
Vacuum leak
Low cylinder compression
Problems with the oxygen sensor

How to Fix

Check the condition of the fuel injectors
Diagnose the ignition system
Check the tightness of the intake tract
Measure compression in cylinders
Check the operation of oxygen sensors

Related codes

P231E P231D P231C