P2189
System Too Lean at Idle (Bank 2)
What it means
This code means the engine's computer has detected that the air-fuel mixture is too lean (too much air, not enough fuel) specifically when the engine is idling on the second bank of cylinders. This typically points to unmetered air entering the engine or an issue with fuel delivery.
Is it safe to drive?
Driving with a lean condition can lead to engine damage, catalytic converter damage, and poor performance. It's best to diagnose and repair this issue promptly.
Most likely causes
Vacuum Leaks
highCracked or disconnected vacuum hoses, intake manifold gaskets, or PCV system components can allow unmetered air into the engine.
Faulty PCV Valve/System
mediumA stuck-open PCV valve or a leak in its hose can create a vacuum leak, especially at idle.
Faulty EVAP Purge Valve (Stuck Open)
mediumIf the EVAP purge valve is stuck open, it can draw too much air/vapor into the intake, causing a lean condition.
Low Fuel Pressure/Faulty Fuel Injector(s)
lowA weak fuel pump, clogged fuel filter, or dirty/failing fuel injector can cause insufficient fuel delivery.
Related help
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