O2 sensor or wiring?

[davisev5225]

I can order a simulator probably good to have. How would I send 0.5 volts through the sensor wire? Sorry what does MVB stand for?

I'd say this is a good course of action, then. You can hover your mouse over MVB and get a definition, but it's "Measure Value Blocks", meaning the sensors and other operations values that your ECU reports. There's quite a few of them.

 

[q76767]

On measuring blocks 030 I get these values for b1 s2 the 1 on there switches from 1 to 0 constantly and b1 s1 stays the same and getting code p0140. Has 2 new oxygen sensors so I doubt it's an sensor issue at this point.

https://imgur.com/a/EbpuBMv

 

[q76767]

https://imgur.com/a/IrTx1VX

 

[q76767]

After driving p1114 returns aswell internal resistance to high b1 s2

 

[davisev5225]

Lambda control isn't what you're looking for. Hopefully someone with information about your ECU can chime in and tell you which MVB group you need. You're looking for one that shows the measured voltage from the sensor output. It should swing between 0.1V and 0.7V or so.

 

[q76767]

Lambda control isn't what you're looking for. Hopefully someone with information about your ECU can chime in and tell you which MVB group you need. You're looking for one that shows the measured voltage from the sensor output. It should swing between 0.1V and 0.7V or so.

https://imgur.com/a/VATbWet

 

[Dr Sheldon]

I can order a simulator probably good to have. How would I send 0.5 volts through the sensor wire?

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[davisev5225]

Group 037 looks correct. Does that 0.45V reading change while the engine is running? It should fluctuate up and down...

 

[q76767]

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I just ordered one unfortunately won't be here till Nov 1-nov 6.

 

[q76767]

Group 037 looks correct. Does that 0.45V reading change while the engine is running? It should fluctuate up and down...

No the 0.45v does not move stays exactly the same

 

[q76767]

No the 0.45v does not move stays exactly the same

Actually if I go to graph it slightly moves very quickly to .47 then right back to .45

https://imgur.com/a/9AxRPYU

 

[davisev5225]

Are you able to swap the plugs for your sensors? If so, clear the codes, then swap them then fire the engine up and check MVB 037 again. We're also looking for new codes to pop up (which there should be, if for no other reason than because the sensors are in the wrong positions now).

 

[q76767]

Are you able to swap the plugs for your sensors? If so, clear the codes, then swap them then fire the engine up and check MVB 037 again. We're also looking for new codes to pop up (which there should be, if for no other reason than because the sensors are in the wrong positions now).

This one only has one by header and one in middle of cat only 2 sensors on here and they are different plugs.

 

[Dr Sheldon]

Actually if I go to graph it slightly moves very quickly to .47 then right back to .45

https://imgur.com/a/9AxRPYU

That is not that abnormal with a good functioning Catalyst.

What does it do if you force it Rich then Lean ?

You can do that in more than 2 ways:

1. Is to Rev it hard and then let it idle - Graph that Please
2 is to remove it and see what it reads in clean air and then hold it over a small container full of Petrol - What Voltages are you getting ??

 

[q76767]

That is not that abnormal with a good functioning Catalyst.

What does it do if you force it Rich then Lean ?

You can do that in more than 2 ways:

1. Is to Rev it hard and then let it idle - Graph that Please
2 is to remove it and see what it reads in clean air and then hold it over a small container full of Petrol - What Voltages are you getting ??

I'll try that in the morning

 

[Dr Sheldon]

I'll try that in the morning

Not only are you looking for it to dip to near 0.1v when ean and circa~ 0.9 volt when Rich but the reaction time needs to be in Milliseconds - Near Instant !!

In the Engine a slow responding O2 is of little use.

 

[q76767]

Ok so I put in on measuring block 037 and graphed it. When revving at 4k rpms for a min it bounces between 0.45-0.71 very fast and soon as I let foot off gas it drops to 0.07 then instantly back up to 0.45-0.71

 

[q76767]

The immo is deleted on this car. I was thinking what if I took the ecu out and put it in another jetta see if that code appears on other car? I have a 15 jetta same configuration. That would tell me if I have a ecu issue?

 

[stefdds]

Hmmm, creative thinking! But going from a 2012 to a 2015 is quite a jump and I can't imagine they are configured the same or close to the same (ie missing or extra pins at ecu connector) . It would be interesting to see That Auto- Scan! I think that would be a bit of a gamble , that is, it may cause damage to your current ecu ?????

 

[q76767]

Hmmm, creative thinking! But going from a 2012 to a 2015 is quite a jump and I can't imagine they are configured the same or close to the same (ie missing or extra pins at ecu connector) . It would be interesting to see That Auto- Scan! I think that would be a bit of a gamble , that is, it may cause damage to your current ecu ?????

Ya I guess I'd rather not take a chance of damaging it. There both base model 2.0 CBPA so was thinking there'd be a chance