P219A

Bank 1 Air-Fuel Ratio Imbalance

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$17–89 (est.)

Symptoms

Unstable engine idling
Increased fuel consumption
Reduced engine power
Check Engine Light Illuminates
Dips during acceleration

Causes

Air leak in intake manifold
Dirty or faulty fuel injectors
Oxygen sensor malfunction
Problems with the MAF (mass air flow sensor)
Leaking intake system

How to Fix

Check the tightness of the intake tract
Clean or replace fuel injectors
Check the operation of the oxygen sensors and mass air flow sensor
Scan the system for other errors
Adapt the engine control system

Related codes

P219B P0171 P0172