www.tdiclub.com

Economy - Longevity - Performance
The #1 Source of TDI Information on the Web!
Forums Articles Links Meets
Orders TDI Club Cards TDIFest 2014 Gone, but not forgotten VAG-Com List Unit Conversions TDIClub Chat Thank You



Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

Reply
 
Thread Tools
Old January 2nd, 2012, 13:43   #1
wetskier2000
Veteran Member
 
Join Date: Aug 2006
Location: NH
Default P0101 code

Keep getting a P0101 MAF MIL on a 2005 PD Jetta wagon with 115k miles.

I began by cleaning the MAF and clearing the code. It returned several days later.

Next I replaced the MAF and cleared the code. Again returning several days later.

It was then that I noticed the 3-4 inch diameter hose from the intercooler to the turbo was no longer seated correctly. The alum fitting on the turbo end was not inserted all the way into the corresponding fitting. The spring clip's bottom section was missing. I replaced the spring, cleared the code, but again the MIL returned.

Now I noticed that the alum fitting on the end of the hose no longer had it's little tabs that hold it behind the spring clip I already replaced. I replaced the hose, it clipped in just fine now, but as you suspected, the MIL came back again.

I'm at a bit of a loss.. No blockages on the intake side, air cleaner or snow screen. The intake has never been cleaned but we run the car agressively regularly and run DieselService full time.

Ideas??

thanks!
__________________
Rick

'05 Jetta Wagon - RC1+, G60/VR6, 16" summer wheels/tires, 15" Green Diamond snows, transplanted leather & electric seat mechanisms, JVC head and changer..
wetskier2000 is offline   Reply With Quote
Old January 4th, 2012, 10:33   #2
wetskier2000
Veteran Member
 
Join Date: Aug 2006
Location: NH
Default

Ok, I've searched and searched the forum, but really found nothing about a P0101 that doesn't go along with poor performance. Our '05 seems to continue to run just fine other than a very slight hesitation my wife reports. So slight I can't even detect it, but I don't drive the car full time.

I've seen some talk about a clogged intake. I've seen the cleaning done at a GTG and it didn't look fun so I'd sure like to really know that's the issue before pulling it apart.
__________________
Rick

'05 Jetta Wagon - RC1+, G60/VR6, 16" summer wheels/tires, 15" Green Diamond snows, transplanted leather & electric seat mechanisms, JVC head and changer..
wetskier2000 is offline   Reply With Quote
Old January 4th, 2012, 10:36   #3
BobnOH
Veteran Member
 
Join Date: May 2004
Location: central Ohio
Fuel Economy: 50/45/35
Default

from the Ross Tech WIKI-


16485/P0101/000257 - Mass Air Flow Sensor (G70): Implausible Signal

Possible Symptoms
Loss of Power
Erratic Idle
Possible Causes
Mass Air Flow Sensor (G70) faulty
Air Leak(s) after Mass Air Flow Sensor (G70)
Intake Air Filter dirty/faulty
Ground Spots corroded or Paint Residue
Wiring and/or Connections from/to Mass Air Flow Sensor (G70) faulty
Possible Solutions
Check Intake Air Filter
Check Mass Air Flow Sensor (G70)
Check Ground Spots
Check Wiring and/or Connections from/to Mass Air Flow Sensor (G70)
Special Notes
In MY 1995-2002 (?) in Europe at VW-diesel-cars G70 had the bad reputation of slowly losing his performance, causing loss of power. It's not a matter of defective or breaking down, but it is filthy / dirty (not easy to clean). You can check functionality by making a log in [01-engine], [meas.blocks-08], group 003 (3e gear, full throttle, from 1700-4000rpm)
BobnOH is offline   Reply With Quote
Old January 11th, 2012, 15:02   #4
wetskier2000
Veteran Member
 
Join Date: Aug 2006
Location: NH
Default

Yup, done everything on the list, still no joy,,, P0101 keeps coming back... Maybe I need a guru...argh...
__________________
Rick

'05 Jetta Wagon - RC1+, G60/VR6, 16" summer wheels/tires, 15" Green Diamond snows, transplanted leather & electric seat mechanisms, JVC head and changer..
wetskier2000 is offline   Reply With Quote
Old January 13th, 2012, 19:23   #5
Dimitri16V
Veteran Member
 
Dimitri16V's Avatar
 
Join Date: Jan 2005
Location: DE
Default

just solved same issue on my PD. the wire from pin 4 in the MAF connector had an intermittent connection to ECU connector.
At the least , reseat the ECU connector . at most ohm out for continuity between both ends of wire
__________________
2001 Golf TDi 175K
2004 Golf TDi 355K
1987 Scirocco16V 185K
2014 Honda Civic
Dimitri16V is online now   Reply With Quote
Old January 16th, 2012, 14:19   #6
wetskier2000
Veteran Member
 
Join Date: Aug 2006
Location: NH
Default

Quote:
Originally Posted by Dimitri16V View Post
just solved same issue on my PD. the wire from pin 4 in the MAF connector had an intermittent connection to ECU connector.
At the least , reseat the ECU connector . at most ohm out for continuity between both ends of wire

thanks, I'll check that... Do you recall the ECM pin? I 'spose I can RTFM, can't I? The ECM has been touched in this car when it was RC'd, but it was years ago... hmmmm... Could it be that easy? Here's hoping! thanks!
__________________
Rick

'05 Jetta Wagon - RC1+, G60/VR6, 16" summer wheels/tires, 15" Green Diamond snows, transplanted leather & electric seat mechanisms, JVC head and changer..
wetskier2000 is offline   Reply With Quote
Old January 16th, 2012, 20:20   #7
Dimitri16V
Veteran Member
 
Dimitri16V's Avatar
 
Join Date: Jan 2005
Location: DE
Default

pin 40 on big T94 pin connector. it should have a red/green wire on it. make sure you count the pins in the right direction to locate pin 40. it is supposed to have continuity with a pin in the MAf, i think it's 4, but check for the same wire color.

It could also be a loose T94 connector or pin 40 may be damaged. make sure the T94 engages and locks in place
__________________
2001 Golf TDi 175K
2004 Golf TDi 355K
1987 Scirocco16V 185K
2014 Honda Civic

Last edited by Dimitri16V; January 16th, 2012 at 20:22.
Dimitri16V is online now   Reply With Quote
Old January 17th, 2012, 05:57   #8
wetskier2000
Veteran Member
 
Join Date: Aug 2006
Location: NH
Default

Quote:
Originally Posted by Dimitri16V View Post
pin 40 on big T94 pin connector. it should have a red/green wire on it. make sure you count the pins in the right direction to locate pin 40. it is supposed to have continuity with a pin in the MAf, i think it's 4, but check for the same wire color.

It could also be a loose T94 connector or pin 40 may be damaged. make sure the T94 engages and locks in place
Thanks! I pulled both connectors last night, cleaned them a bit and used some dielectric grease. (hopefully it likes that). I could not find the pinout in the FM so I closed it back up and reset the MIL. I'll check continuity next if it comes back.. thanks for the pin numbers...

The connector seemed to go back just fine and the lock seemed to work..

Rick
__________________
Rick

'05 Jetta Wagon - RC1+, G60/VR6, 16" summer wheels/tires, 15" Green Diamond snows, transplanted leather & electric seat mechanisms, JVC head and changer..
wetskier2000 is offline   Reply With Quote
Old January 18th, 2012, 10:00   #9
wetskier2000
Veteran Member
 
Join Date: Aug 2006
Location: NH
Default

I stumbled onto the PO0101 thread about stuffing the MAF connector with dielectric grease. I tried that last night... We'll see what the wife reports.
__________________
Rick

'05 Jetta Wagon - RC1+, G60/VR6, 16" summer wheels/tires, 15" Green Diamond snows, transplanted leather & electric seat mechanisms, JVC head and changer..
wetskier2000 is offline   Reply With Quote
Old January 18th, 2012, 15:25   #10
Dimitri16V
Veteran Member
 
Dimitri16V's Avatar
 
Join Date: Jan 2005
Location: DE
Default

Don't do that . these connectors are waterproofed by design.
__________________
2001 Golf TDi 175K
2004 Golf TDi 355K
1987 Scirocco16V 185K
2014 Honda Civic
Dimitri16V is online now   Reply With Quote
Old January 23rd, 2012, 06:09   #11
wetskier2000
Veteran Member
 
Join Date: Aug 2006
Location: NH
Default Intercooler??

Still no joy, ohmed out the connections just fine. Wiggling the wires didn't seem to matter. When following the bouncing ball that is the air input I notied that the right inner fender had a pretty big "pizza" slice out of the front section. Looks like it came loose and rubbed the tire. I wonder if something got thrown into the intercooler or its plumbing. I'll have to get it on the lift and take a closer look...

Anyone think this might be a PO0101?

thanks!
__________________
Rick

'05 Jetta Wagon - RC1+, G60/VR6, 16" summer wheels/tires, 15" Green Diamond snows, transplanted leather & electric seat mechanisms, JVC head and changer..
wetskier2000 is offline   Reply With Quote
Old March 7th, 2012, 16:46   #12
Diesel Maniak
Member
 
Diesel Maniak's Avatar
 
Join Date: May 2010
Location: Canada
TDI(s): 74 Bug
Default

same code here p0101

i have no loss in power or fuel economy

any updates on this situation ? same issue here , though i switched maf from my other bew to my wagon bew and the light came on after 2 hours of driving

only thing i see happening is the intercooler pipe on the egr side where the c clip is , the hose is coming off and i hear air escaping

so i ordered a kerma bew hose fix kit

i am gonna drive my jetta with the wagons maf tommorow morning and see if my jetta throws a code
__________________

Last edited by Diesel Maniak; March 7th, 2012 at 16:48.
Diesel Maniak is offline   Reply With Quote
Old March 7th, 2012, 18:19   #13
jetta ,97
 
jetta ,97's Avatar
 
Join Date: Dec 2008
Location: Dallas (Allen) ,TX ,USA
Fuel Economy: 39 MPG 20%hwy,80% citi;48 MPG hwy
Default

Believe or not but recently I found that camshaft wear can do this.
I had BRM that customer was having same problem even with new MAF and new camshaft fixed problem.
I one more guy told me on his Beetle 2004 BEW it was a same thing.After cam replacement problem was gone.
__________________
I do any repair on all models,USED/NEW ECU and Cluster swap, Reprogramming Keys , Immobilizer Delete,Cluster LCD Dispay Repair -Clik here
I am trusted TDI Mechanic, VCDS
HEX+CAN
ECU TUNING-TDTUNING Authorized Dealer
MK6 Needle Sweep,MK5 Needle Illumination
jetta ,97 is offline   Reply With Quote
Old April 26th, 2012, 20:23   #14
Diesel Maniak
Member
 
Diesel Maniak's Avatar
 
Join Date: May 2010
Location: Canada
TDI(s): 74 Bug
Default

Quote:
Originally Posted by jetta ,97 View Post
Believe or not but recently I found that camshaft wear can do this.
I had BRM that customer was having same problem even with new MAF and new camshaft fixed problem.
I one more guy told me on his Beetle 2004 BEW it was a same thing.After cam replacement problem was gone.


thats an expensive fix

so far got a new clip and hose fix kit - the engine light dont come on anymore
__________________
Diesel Maniak is offline   Reply With Quote
Old May 4th, 2012, 21:58   #15
evolDiesel
Veteran Member
 
evolDiesel's Avatar
 
Join Date: Feb 2011
Location: Portland, OR
Default

Quote:
Originally Posted by Diesel Maniak View Post
thats an expensive fix

so far got a new clip and hose fix kit - the engine light dont come on anymore
Diesel maniak - did that kerma hose kit end up being the final solution?

Wetskier2000 - did you ever find the solution?

I have same situation, no power loss, recently installed a BoostLogic intake.

Jack
__________________

Malone S2 + DSG | Dieseldubs DP+MP | FLOWMONSTER Cat | Aero Res | APR 27mm RSB | 17" Goals | ANS-810 | Shifter swap | Clear markers | VW-R mats | WeatherTech | Rhino-Rack | DSG paddle SW | --> MY PORTFOLIO
evolDiesel is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
CEL code P0101 straw10 VW MKIV-A4 TDIs (VE and PD) 9 July 30th, 2012 15:46
p0101 code maf or vaf teck3109 TDI 101 1 June 6th, 2010 04:12
code: P0101 or 16485 TDI-TT OBD Scanners 4 November 27th, 2007 06:00
Re-occuring P0101 Code scottab VW MKIV-A4 TDIs (VE and PD) 2 August 23rd, 2007 13:09
P0101 obd error code southherogrease VW B5 Passat TDIs 3 July 29th, 2006 19:30


All times are GMT -7. The time now is 23:14.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright - TDIClub Online LTD - 2014
Contact Us | Privacy Statement | Forum Rules | Disclaimer
TDIClub Online Ltd (TDIClub.com) is not affiliated with the VWoA or VWAG and is supported by contributions from viewers like you.
1996 - 2013, All Rights Reserved
Page generated in 0.15243 seconds with 10 queries
[Output: 131.80 Kb. compressed to 109.84 Kb. by saving 21.97 Kb. (16.67%)]