P231A

Cylinder 7 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–89 (est.)

Symptoms

Unstable engine idling
Reduced engine power
Increased fuel consumption
Misfire in cylinder 7
Check Engine Light Illuminates

Causes

Faulty fuel injector of cylinder 7
Problems with the ignition system (plugs, coil)
Vacuum leak in the area of cylinder 7
Low compression in cylinder 7
Problems with the oxygen sensor or mass air flow sensor

How to Fix

Check the condition of the fuel injector of cylinder 7
Inspect the spark plug and coil of cylinder 7
Check compression in cylinder 7
Diagnose the system for vacuum leaks
Check the readings of the oxygen sensors and mass air flow sensor

Related codes

P230A P231B P231C