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Discussion Starter · #1 ·
Same old song and dance. Engine light came on. Codes read.

P1800 VIAS S/V Circuit
P1168 Losed Loop Bank 2 confirmed

The 1168 looks like it is an oxygen sensor. But, could the oxygen sensor be okay and the VIAS is not functioning correctly and messing with the fuel/air ratio?

Should I focus on the P1800 first and see if that corrects the P1168?

Anyone have any "explain it like I'm 5" help on the P1800?

2007 Nissan Quest S, 160K miles.
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