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9

It should hold up. It melts at around twice the temperature where water boils, which I don't think you'll ever experience in the engine bay (unless it's touching the exhaust). But the greasiness in the engine may make for a poor adhesion. BTW: I am one of those people who would rather crimp than solder.


6

No, you don't have to rely on wire colors to figure out what's what. With nothing more than a decent multimeter and premix flame (blowtorch or gas stove), a two-test sequence can reveal the identity of each wire, assuming the O2 sensor is fully-functional: Determine the heater wires This should be done first. These wires serve to heat up the O2 sensor ...


5

I doubt you're going to be able to have someone put a number on this. I'm betting you also know that just because no error was thrown, it doesn't mean that the sensor isn't impacting performance. Lifehacker notes that replacing them could improve mileage "up to 15%." As @BobCross mentioned, "most people wouldn't consider it worth their time to do the ...


4

Disconnect your battery to reset your ECU. It won't hurt, and is probably the cheapest and easiest thing you can try. 30 minutes is usually enough. There are other theories as to why your mileage went down, but I think you're on the right track thinking the ECU hasn't learned to use the new data correctly. I am thinking that because your new 02 sensor is ...


4

If you are going to replace the sensor and have already purchased the replacement, cut the wires off of the old sensor and put a 1/2" drive deep well socket onto it (don't use the split socket for the O2 sensor to take it off, but you will use it to put it back on). Use a breaker bar to break it free, then use a ratchet the rest of the way. If you do not ...


4

With the check engine light on, the car is going to be running a fixed set of parameters from the Engine Control Module. For instance Fuel Pressure will be held at max pressure and timing and spark adjustments (if done electronically) will not retard or advance. One of the reasons this happens is because the Engine Control Module is not recieving all of ...


4

As @LynnCrumbling stated, this would be hard to put a number on, mainly because it depends on too many factors. This is what I can tell you. When O2 sensors get old, they don't necessarily go bad, what they do is get lazy. When a good O2 sensor is doing its thing, if you were to look at the readings from it, the numbers go all over the place, from top of the ...


3

If the catalytic convertor is truly plugged, you wouldn't be able to drive the vehicle, so this makes me wonder about the voracity of your statement. With a plugged cat, the back pressure created behind it will only let you rev the engine to around 1500-2000 rpm. I had to replace a set of heads on a pick-up truck for a guy because he continued to run the ...


3

A narrowband sensor can only measure 14.7:1 AFR (stoichiometric) , where as wideband sensors allows you to measure a range of AFR ~(<10 to ~20). ECU's that rely on narrowband output maintain the AFR at stoich by using closed loop control (cruise etc) and may use various interpolation methods for increasing the open loop accuracy for AFR other than stoich. ...


3

From time to time you do come across a rusted in sensor. Your vehicle being a 2001, and O2 sensors lasting some time, yours is rusted in. If sheer force does not work you may need to use an oxy-acetalyne torch on the sensor to heat to it red-hot to break the rusting and undo it with a good single-hex deep socket. I have had one or two sensors break up and ...


3

Also, remember that MAF is a reading of the amount of air entering the engine. If you have a backflow issues (high backpressure) or even a timing issue where the valves are not opening and closing at the correct time (slack chains, jumped timing), your MAF sensor readings will reflect this as well. I know this post is late, but any who are looking into this ...


2

Short answer, yes - a faulty O2 can make the Check Engine Light / MIL to go on. Do you know what the code is?


2

Solder (60/40) or any other lead-based sort has little mechanical strength. And it decreases as heat goes up. Furthermore, some of the wires used in various places don't work very well with field soldering (such as Litz wire). On the other hand many of them don't work well with mechanical fastening, ie, crimping. Depending on the wires you're working with, ...


2

There are two things which could potentially cause you issues with this. First, you don't know if it is conductive. One of the properties of anti-seize is that it maintains conductivity between the two parts. In this way it works great for spark plugs and O2 sensors. I was reading about it on Wikipedia and it was a little beyond my comprehension right now ...


2

Based on fueleconomy.gov your are getting a little better than what's expected. Comparing the less accurate old rating system to the new, it's still not as high as you were expecting, but it was higher. Compare Old and New MPG Estimates The manual transmission with the 2.0 gets the best mileage that year If you look up mpg on some sites it just ...


2

Just thought I'd bring this in to an answer to allow it to be accepted: This, while not ideal for you in this situation, is to prevent accidental connection to the wrong sensor. This solution is used in any number of applications, on ships, aircraft, even buildings - and in a car you will find many examples. It's one of the reasons I always read the manual ...


2

According to research I've done on the web, the W in WO2S11 stands for wideband, meaning it can calculate much better than a standard O2 sensor. This, I would assume, is what your car is utilizing to get its O2 reading and not the O2S11. And yes, that would be for the bank 1 sensor 1 (upstream or before cat). Your issue is not with the B1S1, though, it's ...


1

I am only answering where the sensor is located.This video explains the whole procedure is nicely. Including the location and how to replace it. https://www.youtube.com/watch?v=y2vXZbFjlxI


1

The best result will be from a VW specialist or dealer. can you tell us the exact error codes, e.g. P0420?


1

Since this is an OBDI vehicle, there will be only one O2 sensor located where the exhaust ports all come together in the exhaust manifold.


1

I am not there to say exactly, but would suggest they probably aren't interchangable. I'd get the one which you researched to be correct. You might be able to sell the one which you don't need on Cragslist at a reduced price. Is it possible that they intended to replace the actual O2 filter in the rear of the car? If you look at the "filter" in the ...


1

Yes it will be fine...if you correctly solder it. If you dont know how to solder then i would suggest a crimp.


1

Typically, these emissions/inspections tests connect to the on-board computer, and that computer will tell you if a code has been cleared. For example, with the O2 code, I think most cars require you to drive 50 miles before the computer will give the "all clear" after the code has been cleared. If you had 3 O2 sensors replaced, then my guess is that your ...


1

Okay, I fixed it. Turns out, I had a bad catalytic converter and I was reading the wrong thing in my original post. I identified the bad cat by looking at the correct sensor data. The data posted (red and blue) is the lambda measurement, which is a derived (not actual) measurement. It's useful for the forward A/F, but useless (as far as I have seen) for ...


1

The Prius has an exhaust system unique to the Prius. As it is a hybrid the engine does not operate continuously, and so the cat has to be a special case in retaining its temperature to 'light-off'. Exhaust vacuum valves and controls require servicing; heat adsorbers have to be working; air/fuel ratio sensors are used as against a straight forward O2 sensor ...


1

I'm just wondering why you aren't considering the downstream O2 sensor as being the culprit? If it is sending back erroneous information back to the computer, the computer might think the cat is bad. The O2 sensor can be bad (or on the way out) and never throw a code. Something an O2 will do over time while going bad is get what is called lazy. Normally, ...


1

Which sensor does the code say is bad? You should have 2 oxygen sensors, one before the catalytic convertor and one after. Be sure to check everywhere from the exhaust manifold to the muffler. I don't specifically where the o2 sensor are in your model, but check the cat itself as well.



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