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S1 A/F sensor current - O2S B1 S2 Heated oxygen sensor output Performing Control the Injection Volume or Control Short FT #1 Short-term fuel trim Short-term fuel compensation used to maintain air- Long FT #1 Long-term fuel trim Overall fuel compensation carried out in long-term Total FT #1 Total fuel trim - Short FT #2 Short-term fuel trim Short-term fuel compensation used to maintain air- Long FT #2 Long-term fuel trim Overall fuel compensation carried out in long-term Total FT #2 Total fuel trim - Fuel System Fuel system status (for Bank 1) OL (Open Loop): Has not yet satisfied CL (Closed Loop): Using heated oxygen OL Drive: Open loop due to driving OL Fault: Open loop due to detected system CL Fault: Closed loop but heated oxygen Fuel System Fuel system status (for Bank 2) OL (Open Loop): Has not yet satisfied CL (Closed Loop): Using heated oxygen OL Drive: Open loop due to driving OL Fault: Open loop due to detected system CL Fault: Closed loop but heated oxygen Secondary Air Secondary air injection system -
2009 Toyota Tundra 2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra
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