My 2000 Maxima is wasting way too much gas

Asked by aevelasquez Dec 02, 2017 at 06:24 PM about the 2000 Nissan Maxima GLE

Question type: Maintenance & Repair

I filled up my tank and only got about $100
on that fill up i went to AutoZone and
checked my check engine light and it came
back  with 2 probable causes:
1. Open or short circuit condition and failed
H02s11 (bank 1 senser 1)
2. Fuel sytem lean bank 1.
What does this even mean and is this the
correct reason my car is wasting so much
gas?  Thank You for your response in
advance

1 Answer
22,320

Guru9FSV8 answered 6 years ago

Oxygen sensor up top on side with cylinder #1 is bad. Car is running an open loop sending more fuel because the computer is not getting any informed from this sensor in order to lean or rich the fuel mixture. The system just over sends fuel.

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