My computer readout of the 98 Expedition 5.4 says oxy sensor 1 open circuit fault, sensor 2 status unknown... Anyone know what one or if both are bad?
1606633
the number one is the one normally closest to the engine. and its most likely bad. I would replace it. and see if the other works after checking the connection. if you still have the second one not working I would then replace it. hope this helps.
1606634
Sensor 1 is bad. It's possible sensor 2 is as well but I would start with just sensor 1 because it could be reading "unknown" because the lack of a signal/data from sensor 1. You didn't specify if they were upsteam sensors (O2S11 & O2S12) or downstream after Cat (O2S21 & O2S22), but the upstream sensors are the most important cuz they control fuel trims & Air/Fuel Ratios. The downstream sensor are really only there to tell you if the Cat is good or not. I'm assuming you only have one Upstream & 1 Downstream sensor but some vehicles have more depending on exhaust setup. You may only see O2S11(Upstream 1) & O2S21(Downstream 1) or a combo of O2S11(Upstream 1), O2S12(Upstream 2) & 02S21(Downstream 1). Or even two Downstreams if you have true dual exhaust & not a Y-Pipe. You can tell if it's a upsteam or downstream sensor by the 4th character in the name coding. Example: 02S*1 * = 1:Upsteam, 2:Downstream. You can tell if it's a right or left sensor by the 5th character in the name coding. Example: 02S1* * = 1:one side, 2: other side. (Sorry can remember which one's right & which is left) Hope this helps.
1606635
Chances are it's Sensor -1 , the parts areCheep, I had similar issues replaced both front sensors and then it turned outThe fuel oxegen / regulator - sensor onthe top of the motor had to be replaced As well a 30$ part @ NaPa ...Good Luck.
1606636
You should have 4 total, 2 upstream and 2 downstream. Sensor 1 is upstream, sensor 2 is downstream. Bank 1 is drivers side bank 2 is passenger side I think
1606637
I'll start by prefacing my answer with...I'm not a professional mechanic. I grew up working on cars with my dad. As I understand the technology, when 1 goes bad it affects the readout on 2. After picking alot of other peoples brains regarding engines with multiple upstream and downstream sensors; the concensus was, if 1 is bad, replace them all. The alternative is replace the 1 and re-test to see if you get a viable readout from 2. Best I can do. Wish you luck.
1824670
I am currently trying to get it to work, the software loads fine but I cannot get the computer to recognize the sensor. I sent an email to the manufacturer, will let you know if I get a response.
85259
If you have the V6, both upstream sensor should be the same. Your diagnostic code should tell you if your problem is bank 1 or 2. I only needed to replace the bank 1 sensor and that solved the issue. Check out this web page for more info, (maybe more than you need, or want). http://www.autoshop101.com/forms/h37.pdf
1495128
I installed denso sensor but did no work. so put back old one then work. the problem was oil pand gasket allow to release. oil into spark in burning oil into the engine cilinder. that cause to block the filter into catalytic converter. That was the problem. resume .You need new Engine or car. 180, 200,000 millas haveEngine on
442236
I had my mechanic diagnose which sensor was defective. Replaced it with the one from Amazon. Still not working. Mechanic checked the new sensor and it is defective. I'm stuck with a paperweight.
1149643
Powerbuilt 648691 Oxygen Sensor Offset Pullerhttp://www.amazon.com/gp/aw/d/B00390BS7C/ref=mp_s_a_1_1?qid=1415260830&sr;=8-1π=SY200_QL40
2027501
Return it would be my best suggestion, get your money back now while you still can. According to the user manual the closest issue that it covers to the one you are describing is: 2. What to do if it can't start up? Answer: Please check whether you have installed the OBD II connector correctly, and whether you have turned on the power supply. So try it on another OBDII car if you can and verify it is not something wrong with your vehicle, then return it when you are certain it is a piece of junk.
1781281
Is there an O2 sensor on the pipe that the fuel module connects to? It should work perfectly as it does on my Yamaha Raider, and I have similar modifications.
2036343
It has been awhile but I am fairly certain that all 4 sensors are the same so should work just fine. After I installed mine, drove around and the check engine light went out on its own. Joe
1236127
Both sensors are the same part number. You either replaced the wrong sensor, both are bad, or you have an electrical issue.
79371
I tried to program it and could not. I took it to the dealer and they told me it was the wrong part. Amazon took it back, no problem there, but it cost almost $300 to replace one sensor. I don't know if I was scammed or not. Proceed with caution.
559030
Not sure. Occasionally the O2 sensor throws a code for other systems being out of spec. It's not always the sensor itself. Also on O2 sensors, get someone to clear the code. You can drive around for several cycles and it may clear on its own, if all is well. But it will take a few trips/few miles.
559026
Sometimes the MAP sensor being dirty will enrich the gas and cause sensor codes like code P0175. Read on line about cleaning the Map Sensor. You may be able to clean the oxygen sensors also. Just google map sensor cleaning or oxygen sensor cleaning.
85257
If you have the V6, both upstream sensor should be the same. Your diagnostic code should tell you if your problem is bank 1 or 2.I only needed to replace the bank 1 sensor and that solved the issue. Check out this web page for more info, (maybe more than you need, or want). http://www.autoshop101.com/forms/h37.pdf
2016344
If your rig calls for a 13477, this IS a 13477. Also, the fitment guide says a 13477 2004 BMW 330xi (an X3). No problem. The pertinent question is whether you are after a pre or post cat sensor. Yes, the sensors before the cat are usually referred to as 'air fuel' sensors, not O2 sensors, but it's not unusual for folks to call all four sensors by the same name. The upstream (first IN line) sensors do sense oxygen, but are of a different construction/type than the downstream O2 sensors. IF you are after a 13477, this is it. I'm not sure this venue supports html..but here's a link that explains the system well: http://www.bimmerfest.com/forums/showthread.php?t=654792
52110
Same here, it's 10 months old and the sensor is broken. Seems to be a trend! Anyone contact the company about fixing it or warranty info?
1474356
I searched my records but could no longer find the codes for my 'check engine' light. I had a review on Amazon which has more details than I can remember. I did have an Accord ULEV and it was fixed by this sensor. However, please check with Amazon. Maybe they would allow a return if it is not right. The first part I ordered from another site did not fit and they allowed me to return.