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2001 Mazda Protege Eating Gas - Problem Code P1170 - Oxygen Sensor?
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m0pelley99
New User
Dec 27, 2011, 7:54 PM
Post #1 of 7
(7540 views)
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2001 Mazda Protege Eating Gas - Problem Code P1170 - Oxygen Sensor?
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Year: 2001
Make: Mazda
Model: Protege
Engine size: 1.6L
110,000km
The car is getting about 60km on a quarter tank of gas, which is very bad. I have the same car, one year older, that gets 150kms to a quarter tank. The car runs totally smooth.
We have done some research and found that most times a P1170 code means bad front oxygen sensor.
I have made a video of the voltage that the oxygen sensor outputs when going through revving cycles.
Apparently normal working sensors output 0.45-0.5v when at idle. When car accelerates, it goes up to 0.9v, and down to 0.1v during deceleration. Do these erratic readings mean the oxygen sensor is gone bad? Also, the oxygen sensor reads 0.112v when the engine is OFF.
Here is the link to the video:
http://www.youtube.com/watch?v=1lgtGUVW9Pw&feature=youtu.be
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 27, 2011, 8:08 PM
Post #2 of 7
(7525 views)
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Re: 2001 Mazda Protege Eating Gas - Problem Code P1170 - Oxygen Sensor?
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No, that's not how a working 0/2 sensor reads. It reads low until it gets heated up and once it;s up to temp it's supposed to constantly cross count from real low to real high and back again. The more frequently it ranges, the better it is working.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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m0pelley99
New User
Dec 27, 2011, 8:13 PM
Post #3 of 7
(7520 views)
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Re: 2001 Mazda Protege Eating Gas - Problem Code P1170 - Oxygen Sensor?
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Any idea what could be causing my bad mileage then? Let me remind you the car runs VERY good, better than my older one does.
I have other research saying it could be either a clogged EGR valve, or misreading MAF. But the car sucks in air quite good.
The car has a lot of power. Sometimes I get a funny smell when I run her through to 6,000rpm, and then park it. Kind of like sulfur, but not really. Almost smells like unburnt fuel.
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 27, 2011, 8:15 PM
Post #4 of 7
(7514 views)
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Re: 2001 Mazda Protege Eating Gas - Problem Code P1170 - Oxygen Sensor?
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Why don't you replace the sensor and find out.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 27, 2011, 8:22 PM
Post #6 of 7
(7491 views)
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Re: 2001 Mazda Protege Eating Gas - Problem Code P1170 - Oxygen Sensor?
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No and No.............Didn't I just explain that to you.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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