FUEL SYSTEM B1 (Fuel system status)

Air / fuel ratio feedback loop status displayed as one of the following.

OPEN: Open loop-has not yet satisfied conditions to go closed loop  .

CLOSED: Closed loop-using oxygen sensor(s) as feedback for fuel control  .

OPEN-DRIVE COND: Open loop due to driving conditions (Power enrichment, etc.)  .

OPEN SYS FAULT: Open loop due to detected system fault  .

CLOSED-ONE O2S: Closed loop, but fault with at least one oxygen sensor-may be using single oxygen sensor for fuel control  .