P230A

Cylinder 1 Air-Fuel Ratio Imbalance - Adjustment At Limit During Balance

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–94 (est.)

Symptoms

Unstable engine idling
Increased fuel consumption
Power Loss
Possible misfire in cylinder 1
Check Engine light comes on

Causes

Malfunction of the fuel injector of cylinder 1
Compression problems in cylinder 1
Vacuum leak in the area of cylinder 1
Malfunction of spark plug or coil of cylinder 1
Contaminated or faulty oxygen sensor (especially bank 1)

How to Fix

Check compression in cylinder 1
Diagnose the condition of the fuel injector of cylinder 1
Check the tightness of the intake tract at cylinder 1
Inspect the spark plug and coil of cylinder 1
Check oxygen sensor readings and mixture adjustments

Related codes

P230B P230C P0171 P0172