P219F

Cylinder 4 Air-Fuel Ratio Imbalance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Uneven engine operation
Increased fuel consumption
Reduced engine power
Dips during acceleration
Check Engine Light Illuminates

Causes

Malfunction of the fuel injector of cylinder 4
Problems with the ignition system in cylinder 4
Vacuum leak in the area of cylinder 4
Dirty or faulty oxygen sensor
Compression problems in cylinder 4

How to Fix

Check the condition of the fuel injector of cylinder 4
Diagnose the ignition system (spark plugs, coils)
Check the tightness of the intake tract at cylinder 4
Test oxygen sensors
Measure compression in cylinder 4

Related codes

P219D P219E P21A0