VCDS O2 reading weird, ECU issue - Club Touareg Forums
 
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post #1 of 5 Old 04-24-2017 Thread Starter
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VCDS O2 reading weird, ECU issue

Hi. I have just had to replace both pre cat lambda sensors on my V6 3.2 BMV engine, 2006 model, one had a heating regulator failure the other had died completely. Checking some relevant values after the repair, I notice that one of the O2 sensors' heating circuit goes On/Off a lot even when the engine has reached operating temperature. The other sensor appears fine. I have a short video of the symptom, can this be posted here?
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post #2 of 5 Old 04-25-2017
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You need to find a host for your video (youtube) and then you can link it here.

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post #3 of 5 Old 04-25-2017 Thread Starter
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No worries, should have thought of that myself ?
Here is the link: https://youtu.be/zqMM0BvZrlU

I am wondering why one of the sensors gives a percentage (of what precisely?), and the other doesn't. Now the B2S2, if it thinks it needs to heat when it doesn't, it will probably wear out pretty soon again?
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post #4 of 5 Old 06-09-2017
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how to change o2 sensor?

Can you tell me how to change the o2 sensors?Can you do it yourself without raise the car up?thanks a lot!
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post #5 of 5 Old 06-09-2017 Thread Starter
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Quote:
Originally Posted by unitpump2013 View Post
Can you tell me how to change the o2 sensors?Can you do it yourself without raise the car up?thanks a lot!
It is really easy to get to the two sensors that sit before the cats (B1S1 and B2S2) just by opening the hood. The other two are deeper down and harder to get to, it will depend how nimble your arms are. In any case you will need a socket that allows room for the cable and torque wrench, I made myself one from a 22mm socket with the help of an angle grinder and a bit of welding.
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