tasrecovery1

Please help! I just bought a 1999 Audi A4 2.8 Quattro 5-speed manual trans...

Battery had died, changed the battery, Check engine light is on with 1 code "P1545" and i have no power whatsoever! And the idle is very low, press the Gas pedal no power, and slow revs..
No missfire, all spark is good. Motor is nice and Quiet..

I was told that the Throttle body Needs re-adaptation?

Im in Berlin NJ area, is there anyone with VAG-COM that can help me out? I have cash and will pay today for someone to help me out! Last resort to going to the AUDI Dealer to reset something simple...

Any help greatly appreciated

AudiAgs

Just finished up work and logged in to see what was going on and saw your post...it looks like you are are on the right track. i checked the Bentley manual for your failure code and here's what it says:

Hopefully someone near you can help out...!


Audi > B5 > Diagnostic Codes > AHA > P1545 > Overview


SAE VAG Description
P1545 17953 Throttle Pos.Contr Malfunction

Notes:
If the throttle valve control module -J338- is removed and installed, or replaced, adaptation of the throttle valve control module to the Motronic ECM is required =>

Required special tools and test equipment

VAG1551 or VAG1552 Scan Tool (ST) with VAG1551/3 adapter cable
VAG1598/22 test box
Multimeter US1119 (Fluke 83 or equivalent)
VW1594 connector test kit
Wiring diagrams

tasrecovery1

Just got back from the audi dealer. they reset the code for me and also turned off the air bag light....

Thanks for your reply and help, i appreciate it.....

rockblock

What did they do in the end, just re-program, or were parts also replaced? I am having the same issue, but I can't get to the dealer as I can't hold a stable throttle and engine dies if i take the foot off the pedal...looks like I will have to look for a towing platform...so annoying.

P.S. Did it cost you an arm and a leg?

4Driver4

Probably just a throttle body calibration. Can be done easily with VAG-COM.

Flying Billy

Disconnecting the battery wipes out the throttle alignment memory. This causes P1545. P1544, and P0123 errors and ****ty running.

An easy fix is:

Press gas pedal to floor, turn ignition on.

hold for 30 seconds.

turn key off, release pedal.

Clear codes with your VAGCOM. No need to register.

Start engine normally.

This worked on my 99 A4 2.8. You can also use registered Ross-Tech.

Flying Billy

Silly me, I think there is an instruction in the owner's manual to turn on the ignition for 1 minute before starting if the battery has been changed.

bebilingual2@gmail.com

Hello all,
Just acquired a 99 Audi A6 which has the problems described below. Just ordered VAG-COM in hopes to reset EPC. Did try all other suggestions, including this below, which was a bit confusing as I did not know if I was supposed to a) Press pedal down to floor, turn key to ignincion...Or B) Use VAG-COM along with it or either or...

Thanks for your help

Alex

Flying Billy

From what I remember the press the pedal routine did not work properly.
In the end I had to register VAG-COM and run TBA with the engine not running.
Throttle Body Alignment (TBA) - Ross-Tech Wiki
This assumes your A6 has cable throttle like the 99 A4.