I have a 2000 audi a6 2.7t 6 speed with 105,000 miles. I got the codes checked cause my check engine light was on and the codes are P1355, P1358, and P1361 which i ran a search and found out its Ignition circuit open circuit for cylinders 1,2, and 3. What does this mean and what do i need to get to fix this? A while ago I started misfiring and i had to replace one of the little square pieces on top of the intake box its about 1.5" x 1". My dad bought it andi have no idea what it controls? He said the other one probably needs to be replaced. Anyone have any input on this and whats the source of the problem is?

thanks
dom

 

Looks like a bad coil pack - Not uncommon!

 

Where is the coil pack located? Could it be one of the POS's on the intake box?

 

Same problem. Misfire on cyl 5. P0305. I read its above the cylinder but how do I get to it? How do they cost?

 

It's a pretty easy job. You need a 10mm wrench or socket, a phillips head screwdriver, and large and small flathead screwdriver.

Take off the vanity covers on the right or left side of the engine, as if you are changing a spark plug. For the right bank, you have to unbolt the coolant tank and swing it out of the way. For the left bank, you have to move the airbox out of the way (disconnect the wiring, split the airbox, then swing it out of the way). The covers come off by turning the screws a quarter of a turn. You'll then be looking at the 6 ignitors. Whichever one is your problem child is likely held in by 2 10mm bolts. Unscrew the bolts, gently pry up on the metal retaining clip that holds the wire in place, and the ignitor will come right out. While you're at it, might as well check the spark plugs, too.

Replacements are about 50 bucks each. ECS Tuning has them, among others. They're called Coil Packs (I call them ignitors; Coil pack is the proper name). Take a walk over to Audidiy.com, too, as there's a how-to change your spark plugs on there. Changing the coil pack is the exact same procedure.

It's not really a matter of if you're going to lunch a coil pack, it's more a matter of when. Not one of Audi's best designs, but then again, given what you're asking the thing to do, it's amazing they last half as long as they do!!

-Red

 

I dont think its my coil pack. Just a few hours ago i went and switched my ignition modules that are located on top of the air box? I went and got the codes checked and now i have an open circuit on cylinders 4,5, and 6 but not anymore on cylinders 1,2, and 3. The two modules have different numbers on them one is 4A0 905 351A and the other is 4A0 905 351. I had one replaced a while ago and i believe the original one is the 4A0 905 351A.

Can anyone check on the 2.7T engine on top of the air box there are two rectangular shaped modules that will have numbers on them. Can some one verify if they are both to have an A at the end?

Is there anyway to check these modules to see if they work?

 

Thanks alot RedShoeRider. Helped alot.

 

Lets see if I got this right --

1. You had codes saying that the 1, 2 and 3 were bad
2. You switched modules and it said 4, 5 and 6 are bad

Why haven't you purchased a new module yet?

 

I'm trying to figure out which module is the right one. I have one that is 4A0 905 351A, which is one of the original ones. Then i have one that was replaced a while back and is 4A0 905 351. So im thinking maybe the one i replaced a while ago is the wrong one because i still had a check engine light on due to cats but those have been replaced and now its just the open circuit codes. I would like someone to check on there 2.7T engines for what the correct one is before i go buy one. Or if someone knows which one controls which bank for example does the module closer to the firewall control cylinders 1 -3 and the other one closer to the radiator control 4-6?