Question

2008 toyota corolla check engine light on. Got diagnostic test code P2237. Can't seem to figure it out. If anyone have any answers, please share. Thank you in advance.

Answer 1

P2237 A /F (airflow) sensor pumping current circuit / open (Bank 1 Sensor )

 this is the upstream air flow sensor (reffered to as the oxygen sensor)  , when this code condition occurs there is a open circuit within the airflow sensor , airflow sensor do wear out due to mileage and useage.