View Full Version : What does this code mean, how to fix it?

03-19-2006, 02:56 PM
I got the code ( P1681 Contr. unit programming, programming not finished) from the ecu i have a 1997 audi 1.8T (Automatic) chipped w/APR 91 oct.

Please help!!!!!!!!!!!

03-19-2006, 03:33 PM
have you cleared it? and then seen if it comes back? does the car run fine? tell us more sister..

03-19-2006, 03:41 PM
I cleared it several times it still came back. The car runs fine, but i get horrible gas milege.

03-19-2006, 03:46 PM
how long ago did you get chiped?

03-19-2006, 03:51 PM
that is a problem with the ecu or ecm. electronic control unit or module. you might wanna call the place you got the chip done at.. let them know.. i dont know what causes that code..

First digit structure is as follows:

* Pxxxx for powertrain
* Bxxxx for body
* Cxxxx for chassis
* Uxxxx for future systems

Second digit structure is:

* P0xxx Government required codes
* P1xxx Manufacturer codes for additional emission system function; not required but reported to the government

Third digit structure is:

* Px1xx measurement of air and fuel
* Px2xx measurement of air and fuel
* Px3xx ignition system
* Px4xx additional emission control
* Px5xx speed and idle regulation
* Px6xx computer and output signals
* Px7xx transmission
* Px8xx transmission
* Px9xx control modules, input and output signals

03-19-2006, 03:51 PM
About 8 months ago. I got VAG about 6 Months ago and this is the only code i have seen. every time i clear the code it comes back but their is no cel

03-19-2006, 03:55 PM
you still havent contacted the place you got the chip done in 8 months of having this problem?

what is your gas milege?

03-19-2006, 03:56 PM
do you clear the code from the engine fault section, or just the auto scan mode?

03-19-2006, 04:09 PM
about 15mpg

03-19-2006, 04:10 PM
yes it is from the engine fault section

03-19-2006, 04:13 PM
i cant tell you exactly what is wrong, sounds like a fucked program or chip problem.. i would call the chip place and tell them to reflash the program.. and make sure they gave you the right octane program..