View source for 17519/P1111

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=== 17519/P1111 Oxygen sensor control; Bank 1: System too lean ===

==== Possible Causes ====

* Mass Air Flow Sensors (G70) faulty
* Intake Air System faulty/leaking (false Air)
* Fuel Injector(s) faulty
* Insufficient Fuel Delivery
* Exhaust System leaking
* Faulty O2 Sensor(s)

==== Possible Solutions ====

* Check Mass Air Flow Sensors (G70)
* Check Intake Air System for Leaks
* Check Fuel Injector(s)
* Check Fuel Delivery Including Pump and Filter
* Check Exhaust System for Leaks
* Check O2 Sensor(s) Adaptation Values (Before Clearing Faults: [[Fuel Trim Info|Fuel Trim Information]])

[[Category:Fault Codes]]