O2 sensor question n OBD2 reading

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Apr 9, 2013 | 10:57 PM

Slingnsteel

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From: Agawam, MA

O2 sensor question n OBD2 reading

I have a 1999 F250 SD V10 4x4. It is running a little sluggish. Here is a list of things i have replaced. New headers, EGR valve, EGR valve sensor, plugs, coils (el cheepo ebay onses. I know, I know) Here are the O2 readings off my OBD2

02B1S1 .115
02B2S1 .140
I read that the sensors are supposed to read .450 so I decided to change them thinking they may be week.

today I started changing the O2 sensors. I believe my truck only has 2 sensors before the converter and none behind. I changed the drivers side. the passenger side has a smaller nut size 19mm, the driver side was 22mm. Is that how it is supposed to be? The sensors are Bosch 15717. does the same sensor go on both sides?

After changing the sensor my reading was .550 and .750 the second time.

SM

Apr 10, 2013 | 06:21 AM

mikeismadness

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From: laporte in

First, get rid of those Bosch sensors. Get OEM like motorcraft, Denso, or NGK. Your o2 reading should not be consistent, they should fluctuate between .01-1.0

Apr 10, 2013 | 05:06 PM

Slingnsteel

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From: Agawam, MA

ty Mike for the reply. changed out O2's and truck runs much better.

Apr 10, 2013 | 08:03 PM

IslandBlueV10

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Joined: May 2010

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From: Pocatello, Idaho

Slingnsteel, What type of scanner did you use to get your o2 readings? And what brand o2's did you end up using? Did you stick with the Bosch or go a diffrent brand?

Thanks.

Apr 10, 2013 | 10:27 PM

Slingnsteel

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From: Agawam, MA

I am using a harbor fright scanner Obd2. I checked under my hood for a sticker that says whether its a obd or obd2 but could not find it.
I stuck with the Bosch I had one installed already and scuffed up the other. No chance of a refund so I just stuck with em.
SM

Apr 11, 2013 | 06:49 AM

projectSHO89

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From: St Louis

Bosch O2 sensors work fine in Fords. Their spark plugs, OTOH,.....

O2 sensors, when working properly, switch rapidly back and forth between .1 and .9 volts as the PCM controls the A/F ratio to keep it around stoic. A single snapshot measurement of the O2 voltage is useless unless you're looking for a sensor that's "stuck" due to failure. You have to watch the switching to see if it's clean and consistent to see if the sensor is good, bad, or just lazy.

If your truck has no downstream (post cat) O2 sensors, it is OBD1.

Apr 11, 2013 | 10:20 AM

Slingnsteel

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From: Agawam, MA

I saved a live feed on my scanner which is 60 frames and I would say it averages them. I am hoping obd2 will give me at least a good o2 sensor reading. Would it be worth it to get an obd1 scanner, would it read things obd2 won't?
SM