cmlltan

my a6 4.2 for the first time will not start. it has 205k on it and here are the codes that I have:
17831 - Secondary Air Injection System; Bank 1: Insufficient Flow
P1423 - 35-10 - - - Intermittent
17819 - Secondary Air Injection System; Bank 2: Insufficient Flow
P1411 - 35-00 - -
17549 - Load Calculation Cross Check: Implausible Value
P1141 - 35-10 - - - Intermittent
17640 - Fuel Injector for Cylinder 8 (N86): Short to Ground
P1232 - 35-00 - -
17633 - Fuel Injector for Cylinder 1 (N30): Short to Ground
P1225 - 35-00 - -
17636 - Fuel Injector for Cylinder 4 (N33): Short to Ground
P1228 - 35-00 - -
17637 - Fuel Injector for Cylinder 5 (N83): Short to Ground
P1229 - 35-00 - -
17635 - Fuel Injector for Cylinder 3 (N32): Short to Ground
P1227 - 35-00 - -
17638 - Fuel Injector for Cylinder 6 (N84): Short to Ground
P1230 - 35-00 - -
17634 - Fuel Injector for Cylinder 2 (N31): Short to Ground
P1226 - 35-00 - -
17639 - Fuel Injector for Cylinder 7 (N85): Short to Ground
P1231 - 35-00 - -
if any one has any idea where I need to start looking. thanks

AR15Texan

Strange that all the injectors are shorted to ground. Just a guess maybe check your fuses on the dash side panel and then relays under the driver's side dash. I know some of my fuses and relays worked themselves loose and my car would not start.

Redneck Truck

Short to ground is a lot worse than an open circuit. Is there anything you've done on the car recently that might have had an impact on this system in some way? If not, get a wiring diagram out and see what all 8 have in common in terms of wire proximity.

cmlltan

I was looking at some other fourms I found a couple pepole having problems with some of the injectors but not all of them. It looked like they were changing the fuel pump relay. If any one has another ideas please let me know the bad part is its now stuck 1hr from my house.

socalclimber

What year car?

Have you checked ALL the fuses, even the ones in the plenum area by brake master cylinder?

Especially in left side main fuse panel:
28 Fuel pump
29 ECM
32 ECM
34 ECM + injectors

Left plenum area (by brake master, inside box):
ECM fuse 15A
Secondary air injection 40A

Is there any water in there, maybe drain is plugged and water has seeped in?

Bring some spares (15A, 20A, 30A, 40A) and replace above with same amperage fuses.

cmlltan

it is an 2001 i will make sure to check those fuses tomarrow thanks

socalclimber

I have an '02 4.2 and I just looked in the plenum E-box, kind of hard to get to the rear screw (need 1/4" ratchet w/ 8mm socket), there are 5 or so screws.

In my E-box, there was only the 40A SAI fuse (bigger than other fuses), 2 relays, and the ECU.

I think I would look to the main fuse panel first and make sure everything is good there.

cmlltan

thanks for your help. I replaced the fuel pump relay and it started right away.