[DeadGuy]

So I recently was given a Passat . I noticed That it was shifting odd (not going into overdrive on the highway and shifting out of 2nd and 3rd at really high rpm 3800-4500) I have done a lot of research, I have taken it to dubwerx in Cincinnati and they can't find any error codes and couldn't replicate the issue. What's odd is it doesn't do this consistently. I can drive this car for a day or 2 and it won't happen at all, but then when it comes up I can't drive in automatic because it keeps occurring so I have to drive it in tip. Sorry for a long post but I'm just trying to figure out what is wrong.

 

[Tomvw]

Scan eng & trans with VCDS.
Clean MAF sensor with MAF sensor cleaner only.
Check MAF sensor.
Ross-Tech-Tip - Diagnosing a VW/Audi MAF Failure.
http://www.ross-tech.net/vag-com/advertising/DiagnosingA_MAF_TechTip.pdf

 

[DeadGuy]

i will look into that as well I did run it with it unplugged and it seemed no better

 

[DeadGuy]

02 v6 awd tiptronic Maf Sensor Question

So I have been having shifting issues, and one suggestion was checking the MAF sensor. After doing some reading i unplugged and drove it for a couple miles to see if it would run better. I actually noticed the opposite, my car ran even worse with really hard shifting and clunking. I noticed now that the error code p0102 and p1857 have showed up I imagine because i unplugged the sensor and then drove it. Why would my car perform worse with the Maf sensor unplugged?

 

[Tomvw]

One thread for one issue please. http://www.passatworld.com/forums/b5-garage/530993-02-v6-awd-high-rpm-shifting-issues.html

It is good manners and will achieve better results.

 

[patrickmccaherty]

Your car needs sensors like the maf, air intake temp, ambient air temp, tps, cps to adjust fuel and fire. It's not really good to unplug and just drive it. Is it at all possible it's a transmission issue?

 

[Tomvw]

i will look into that as well I did run it with it unplugged and it seemed no better

This would indicate that the MAF sensor is likely faulty, you should run the test.

A full VCDS scan would be helpful.

 

[DeadGuy]

Thanks for the advice I did take the maf apart and clean it, however I'm still having issues with my 2nd and 3rd gears intermittently. I took it to another local import shop and they were able to replicate the issue. How ever they do not feel it's a bad transmission (they did receive a p1857 error code, but they think that's from me disconnecting the maf sensor)I'm going to check my transmission control module this weekend. And replace my maf sensor. Anyone have any other input. I do have a video of my dash when it's acting up
In 2nd gear but I doubt I can post it.

 

[DeadGuy]

I unplugged it to see if it would drive any better from some advice from a local mechanic. I have taken it 2 two vw specialist and neither of them have seen any codes to indicate the transmission has an issue.

 

[DeadGuy]

I will have it scanned again thanks for the reply, Im also going to the junk yard to see if i can pull a few maf's and test those as well.