P219D 2016 Toyota RAV4 Code - Cylinder 2 Air-Fuel Ratio Imbalance

P219D indicates a Cylinder 2 Air-Fuel Ratio Imbalance, meaning the engine control module (ECM) has detected that the air-fuel mixture in Cylinder 2 is not within the expected range.

Symptoms may include poor fuel economy, rough idling, hesitation during acceleration, increased emissions, and possibly an illuminated Check Engine Light.

Common causes include a faulty fuel injector, vacuum leak near Cylinder 2, a malfunctioning oxygen sensor, a clogged air filter, or issues with the mass airflow sensor.

Yes, a dirty or clogged air filter can restrict airflow, leading to an imbalance in the air-fuel ratio for Cylinder 2.

Diagnosis involves using an OBDII scanner, inspecting the spark plugs, fuel injectors, and oxygen sensors for faults, checking for vacuum leaks, and verifying proper airflow and fuel delivery.

Driving for an extended period with this code can cause engine damage, increased emissions, and further damage to components like the catalytic converter.

Repairs may include replacing or cleaning the fuel injector for Cylinder 2, fixing vacuum leaks, replacing a faulty oxygen sensor, or cleaning/replacing the mass airflow sensor.

Yes, contaminated or low-quality fuel can cause improper combustion and lead to an air-fuel ratio imbalance in Cylinder 2.

The cost varies depending on the cause, ranging from $100 for a simple sensor cleaning to $500 or more for replacing fuel injectors or other components.

Resetting the light without addressing the underlying issue may temporarily clear the code but won’t resolve the problem, and the code is likely to return.