DIY engine computer reset.

397184 Views 66 Replies 46 Participants Last post by Tomvw, Jun 20, 2021

Fred 01 Hybrid

Discussion Starter · Aug 11, 2004 (Edited by Moderator)

There has been a lot of posts in the last fw months about codes and reseting the computers without paying VW $60 to do it. well for the DIY here is a home remedy, unfortunatley this does not allow you to read the codes but however it does allow you to reset teh computer to the same position as if the dealer would.

I learned this procedure from a very reliable source at VWOA. 8)

1) remove both the Positive and teh negative battery terminals from the battery.

2) Wait 15 seconds then touch the 2 removed battery leads together and hold for 10 seconds then seperate. (This immatated the same capicitor discharge that is involved with the Vagcom reset)

3) replace and reattach the terminals to the battery

4) stick key in ignition and turn to ignition on (DO NOT START THE CAR) and leave in this position for 30 seconds to allow the newely reset computer to re-learn the parts of your vehicle.

5) Enjoy not having a check engine light staring you in your face.

I have done this procedure countless times now during the rebuild, changing and modification process of my motor, trans and turbo and saved me a lot of time and headaches. 😉

Reactions: 1

1 - 20 of 67 Posts

slimebucket

· #2 · Aug 11, 2004

Fred

If only people knew how smart you are! Amazing bro :bow: :bow: :bow: :bow:

:thumbup: :thumbup: for Fred. Thanks Fred this will help out next time I forget my gas cap :weirdo:

Rich

Rusty

· #3 · Aug 11, 2004

This could be very handy, thanks!

crash893

· #4 · Aug 11, 2004

or you could buy a 80 dollar br-3 and never have to reset your radio again

dekode

· #5 · Aug 11, 2004

Is it safe for guys like me running with APR DPP?

I normally just borrow my buddies VAG-COM, but that get's old.

oke:

dgabler

· #6 · Aug 11, 2004

uhhh br-3? what is that?

judedude

· #7 · Aug 11, 2004

Some guy is selling what I would think is the same information on E-bay to reset the change oil warning on Audi's.

Stranded In Daytona

· #8 · Aug 11, 2004

would this reset codes u altered w/ a vag com? such as my Tiptronic sport mode? thanks.
Cam

Meap

· #9 · Sep 11, 2004

We tried this procedure several times on my friends AEB 98 1.8t to reset his airbag light and check engine light. It didn't work for us. The check engine light eventually went off by itself during a long drive and the airbag light is still on to this day.

gojimbo

· #10 · Sep 11, 2004

A little-known extra step in this procedure is that the driver's door must be open during the "ignition on" step. Since the door usually remains open to make it easier to hop in and out of the car during this procedure, almost everyone manages to perform the procedure without having to consider that point.

But, if you've not been able to get this procedure to work, you might want to see if you been leaving the door open. VW wrote the code this way so resets wouldn't happen during normal operations with the door closed.

Reactions: 1

Meap

· #11 · Sep 13, 2004

gojimbo said:
A little-known extra step in this procedure is that the driver's door must be open during the "ignition on" step. Since the door usually remains open to make it easier to hop in and out of the car during this procedure, almost everyone manages to perform the procedure without having to consider that point.

But, if you've not been able to get this procedure to work, you might want to see if you been leaving the door open. VW wrote the code this way so resets wouldn't happen during normal operations with the door closed.

Thanks !

the_house

· #12 · Feb 7, 2005

Anybody with APR DPP try this yet?

darisgin

· #13 · Feb 7, 2005

Does the radio need to be re-set afterwards?

modifiedA4

· #14 · Feb 7, 2005 (Edited by Moderator)

gojimbo said:
A little-known extra step in this procedure is that the driver's door must be open during the "ignition on" step. Since the door usually remains open to make it easier to hop in and out of the car during this procedure, almost everyone manages to perform the procedure without having to consider that point.

But, if you've not been able to get this procedure to work, you might want to see if you been leaving the door open. VW wrote the code this way so resets wouldn't happen during normal operations with the door closed.

if you have specific information from VW regarding that part of the procedure please share it. Otherwise, the whole door open thing is probably an urban legend. FWIW, I never once heard it mentioned on Audiworld.

In the "B5 garage" there is a recent discussion on throttle body alignment/adaption:

http://www.passatworld.com/forums/showthread.php?t=172629

NUISANCE

· #15 · Mar 6, 2008

Gonna give this a shot tongith as I have a CEL holding me back from smog.

kenblasko

· #16 · Mar 6, 2008

NUISANCE said:
Gonna give this a shot tongith as I have a CEL holding me back from smog.

If CA scans for readiness, you will still fail since I doubt this can set the readiness bits to pass.

NUISANCE

· #17 · Mar 6, 2008

I hope it does, it's a damn o2 sensor.

swcrow17

· #18 · Mar 6, 2008

Not doing this until someone else has the balls to try it with their DPP'd APR program :nervous: but absolutely GREAT info....I need this to get rid of my SAIP CEL

jtdbsr

· #19 · Mar 6, 2008

Meap said:
We tried this procedure several times on my friends AEB 98 1.8t to reset his airbag light and check engine light. It didn't work for us. The check engine light eventually went off by itself during a long drive and the airbag light is still on to this day.

I'm pretty sure you need a VAG-COM to reset the Airbag light.

qwerty

· #20 · May 28, 2008

Meap said:
We tried this procedure several times on my friends AEB 98 1.8t to reset his airbag light and check engine light. It didn't work for us. The check engine light eventually went off by itself during a long drive and the airbag light is still on to this day.

I recently reset the check engine by accident when changing the battery as explained by the original poster. A local mechanic told me that if there is a real issue (in my case the secondary air pump is faulty), the check engine light will come back on after about 50-60 miles of use.

1 - 20 of 67 Posts

This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.