Bank 1 Upstream O2 Sensor Help - Ranger-Forums - The Ultimate Ford Ranger Resource


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Old 01-16-2011
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Bank 1 Upstream O2 Sensor Help

I'm working on replacing the O2 Sensors on my truck, and did two (Driverside Upstream, and the single Downstream) last weekend; they were Bosch PN 15664 and 15718 respectively. They went in without a problem, and work fine. This weekend I bought the last one I needed, a 15664 for the passenger side upstream, but when I went to put it in the wire was too short.

Has anyone else had this problem? The connector is pretty far up by the engine, so I can't really see if there's any slack that I can let out, or if it will stretch any. Are there any other parts that would have the same sensor and butt, with just another inch and half of wire?

Thanks in advance for any help!

Last edited by Naughton; 01-20-2011 at 07:54 AM.
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Old 01-18-2011
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Anyone?
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Old 01-26-2011
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Sorry if this is menial work, but I had trouble with it.

For anyone else who was wondering, or for anyone who searches this topic in the future; I didn't find anything. I checked Advanced, Autozone, and Napa, and none of them had an aftermarket unit that worked. The 'exact' fit sensor is too short, and the only other option I could find was to splice the old butt connector onto a new sensor, which I didn't want to do because the wire and connector were pretty ratty. Anyway, I went to the Ford Stealership, and paid $90 and waited a week to get the OEM sensor. The part number from Ford is XL3Z-9F472-BA, and it can be found on Amazon for $50 or so.
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Old 01-30-2011
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so the o2 sensors are what they are talking about when you see bank 1 and bank 2?

glad to see you got your problem sorted out. i've never had to replace them yet (knock, knock).
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Old 01-31-2011
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Quote:
Originally Posted by morris View Post
so the o2 sensors are what they are talking about when you see bank 1 and bank 2?

glad to see you got your problem sorted out. i've never had to replace them yet (knock, knock).
No, Bank 1 and Bank 2 refers to each bank of a V design engine. These types of engines have two "banks" of cylinders in rows. Bank 1 is always the side where cylinder #1 is.

Often times folks will refer to O2 sensors in accordance to their placement. All 1996 or newer vehicles have an O2 sensor upstream of the catalytic converter, and one downstream of it. A V-style engine will have 4 O2 sensors total.
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Old 02-02-2011
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Quote:
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so the o2 sensors are what they are talking about when you see bank 1 and bank 2?

glad to see you got your problem sorted out. i've never had to replace them yet (knock, knock).
Murphey got it dead on.
I only had to replace the one, but since the other two were easy enough, I decided they should be done too. Depending on how many miles you have, I would consider doing them. It helps your mileage, throttle response, and in my case, the idle.


Quote:
Originally Posted by Murphy View Post
No, Bank 1 and Bank 2 refers to each bank of a V design engine. These types of engines have two "banks" of cylinders in rows. Bank 1 is always the side where cylinder #1 is.

Often times folks will refer to O2 sensors in accordance to their placement. All 1996 or newer vehicles have an O2 sensor upstream of the catalytic converter, and one downstream of it. A V-style engine will have 4 O2 sensors total.
The SOHC only has 3 of them. Two upstreams, and then a single downstream. I thought it was pretty odd too.
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Old 02-03-2011
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The SOHC only has 3 of them. Two upstreams, and then a single downstream. I thought it was pretty odd too.
Oh yeah, I forgot about that. On cars with Y-pipes, sometimes there is only one downstream O2 sensor. Oftentimes there is a cat that is behind that sensor too. Why manufacturers put in a cat that isn't monitored, I have no idea.

O2 sensors theoretically last forever, but their real "working life" can be as little as 75-80,000 miles. When they get old, they can start to act up. Usually this sets a code, as the ECM is VERY sensitive in regards to the data it receives from the O2 sensors, but sometimes not.

Also keep in mind that coolant will KILL O2 sensors INSTANTLY. So if you pop a headgasket and coolant gets into the exhaust, plan on replacing all the O2 sensors too.

I had this issue with a '92 Sable that I did headgaskets on (common issue with that model year). Car had intermittent and random misfire issue with a CEL while driving. Replacing the O2s fixed that.
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