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#1
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Oxygen sensor problem
Hi! I read the fault codes from my A4 1,6 liter, and I got one fault code.
It says: 16515 - Oxygen (Lambda) Sensor B1 S1: Signal too Low P0131 - 35-00 - - Does anybody have any idea what might be causing this? I checked the intake and the exhaust for leaks but it's all fine. Thanks for any suggestions you might have. |
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#2
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check the wiring for the first Oxygen sensor and the sensor itself.
I think your vehicle has two, one before the cat. conv. and one after the cat. conv. good luck, dave "Loki" > wrote in message ... > Hi! I read the fault codes from my A4 1,6 liter, and I got one fault code. > It says: > > 16515 - Oxygen (Lambda) Sensor B1 S1: Signal too Low > > P0131 - 35-00 - - > > > > Does anybody have any idea what might be causing this? > > I checked the intake and the exhaust for leaks but it's all fine. > > Thanks for any suggestions you might have. > > |
#3
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Hi Dave!
There is only one O2 sensor. I checked the wiring but I'm not sure how to check the sensor... Is there a simple way to find out if the sensor is working properly? Thanks! "dave AKA vwdoc1" > wrote in message . com... > check the wiring for the first Oxygen sensor and the sensor itself. > I think your vehicle has two, one before the cat. conv. and one after the > cat. conv. > > good luck, > dave > > "Loki" > wrote in message > ... > > Hi! I read the fault codes from my A4 1,6 liter, and I got one fault code. > > It says: > > > > 16515 - Oxygen (Lambda) Sensor B1 S1: Signal too Low > > > > P0131 - 35-00 - - > > > > > > > > Does anybody have any idea what might be causing this? > > > > I checked the intake and the exhaust for leaks but it's all fine. > > > > Thanks for any suggestions you might have. > > > > > > |
#5
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Hi!
It's 1996. I hooked up vag-com to it but I don't have the correct label file for my engine, so I'm not sure if I'm looking at the correct measuring block. I shows a value of around 0.5 V and it fluctuaes... It drops to 0.0 then comes back to 0.5 and so on... BTW I was also looking at another measuring block that is showing four voltages. These voltages are not the same, and they change as the RPM change, but when I rev up the engine to about 4000 RPM they equilaze and stop at 5.100 V. Do you know what this could be? Thanks again for your time! Cheers! > what year is this A4? > You should be able to hook up a vag-com tool (ross-tech.com) and easily tell if > the 02 sensor is working. > Also some use a digital voltmeter/multimeter and check for voltage at the 02 > wiring plug with the plug still connected (backprobe). Voltage has to > fluctuate. Bentley repair manuals might tell how to do this. > Or searches on the web will give you sites like these: > http://www.forparts.com/o-21.htm > http://www.ibmwr.org/ktech/O2-sensor-testing.shtml > > Your 02 sensor should be heated also, and that may cause other problems if > somehow the wires are shorted/melted. :-( > > later, > dave > Reminder........ > Before you criticize someone, you should walk a mile in their shoes. That way, > when you criticize them, you are a mile away from them, and you have their > shoes. Frieda Norris > |
#6
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Hi!
I forgot to mention one thing earlier... When the engine is cold it idles at aprox. 1200 - 1300 RPM. After about two minutes it drops to about 860 RPM. Is this nomal or should it be idling at 860 right away? Thanks! |
#7
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