P2177

SAE VAG Description
P2177 18609 System Too Lean Off Idle Bank 1

Intake system
Intake system for leaks (false air), checking Intake Air System, Checking For Leaks (False/Unmetered Air)

Oxygen sensor and oxygen sensor control before catalytic converter
Oxygen sensor and oxygen sensor control before catalytic converter, checking [1][2]Oxygen Sensor Before Catalyst, Checking

Oxygen sensor and oxygen sensor control behind catalytic converter
Oxygen sensor and oxygen sensor control behind catalytic converter, checking [1][2]Oxygen Sensor Behind Catalyst, Checking