Codes ran through VCDS: Opinions please

[HuskerNation]

So, recently I have had a misfire, and I have replaced some parts that weren't the issue. I was going to my local auto part store and having them run codes and I was only getting a P0300. I decided to replace the coil packs (all 6) and spark plugs. Needless to say, that didn't fix it. I then decided to order a VCDS tool and Ross Tech's software and did a fault code search and this is what I came up with. Since I have the free version (3rd party) I manually looked up the codes and inserted so you guys don't have to. It seems that one whole side (1-2-3) are misfiring, causing the P0300 code. I see that there is low fuel in bank 1 &2. What should I replace next? I am tired of wasting money. Also, Exhaust Gas Temp Sensor a big deal?

7 Faults Found:

17861 - Exhaust Gas Temp Sensor 1 (G235): Open or Short to Plus
P1453 - 35-00 - -

16684 - Shareware Version. To Decode all DTCs (Random Misfire)
P0300 - 35-00 - Please Register/Activate

16685 - Shareware Version. To Decode all DTCs (Cylinder 1: Misfire Detected)
P0301 - 35-00 - Please Register/Activate

16687 - Cylinder 3: Misfire Detected
P0303 - 35-00 - -

16686 - Shareware Version. To Decode all DTCs (Cylinder 2: Misfire Detected)
P0302 - 35-00 - Please Register/Activate

17831 - Shareware Version. To Decode all DTCs (Sec.Air Inj.Sys.,Bank1 Flow too Low)
P1423 - 35-10 - Please Register/Activate - Intermittent

17819 - Secondary Air Injection System; Bank 2: Insufficient Flow
P1411 - 35-10 - - - Intermittent

[redneck truck]

That's not VCDS!

[Vinnie981]

lol.....

17831 - Shareware Version. To Decode all DTCs (Sec.Air Inj.Sys.,Bank1 Flow too Low)
P1423 - 35-10 - Please Register/Activate - Intermittent

17819 - Secondary Air Injection System; Bank 2: Insufficient Flow
P1411 - 35-10 - - - Intermitten

either you SAI Pump is going bad or you could have a cracked line (LEAK). Remove it and have it coded out. Its worthless


16684 - Shareware Version. To Decode all DTCs (Random Misfire)
P0300 - 35-00 - Please Register/Activate

16685 - Shareware Version. To Decode all DTCs (Cylinder 1: Misfire Detected)
P0301 - 35-00 - Please Register/Activate

16687 - Cylinder 3: Misfire Detected
P0303 - 35-00 - -

16686 - Shareware Version. To Decode all DTCs (Cylinder 2: Misfire Detected)
P0302 - 35-00 - Please Register/Activate

check you spark plugs (condition and gap)
check you coil packs

[HuskerNation]

Ok. I will just remove it. Is there a DIY anywhere? How do you code it out? Sorry I am still learning the Audi way and obviously the slingo.

Vag-com... VCDS.... whatever its called, I think the point is clear lol.

As for the misfires, and them coming from one bank, you think that could be a ICM issue? Can I switch the controls around and see if the misfire switches sides? I have replaced the coil packs (two weeks ago) and the sparkplugs(2 months ago)

[redneck truck]

at very least, you have an EGT sensor unplugged and SAI insufficient flow.

I'm not familiar with the 2.7T SAI system, but who worked on the car last, and what was done? First thing I'd suspect is vacuum leaks.

Btw, I'm not giving you shit for calling it VCDS; I'm giving you shit for buying a $5k car and not a $300 diag setup that's considered by most to be essential.

[HuskerNation]

at very least, you have an EGT sensor unplugged and SAI insufficient flow.

I'm not familiar with the 2.7T SAI system, but who worked on the car last, and what was done? First thing I'd suspect is vacuum leaks.

Btw, I'm not giving you shit for calling it VCDS; I'm giving you shit for buying a $5k car and not a $300 diag setup that's considered by most to be essential.

I bought the car for $3800 a few months ago, shortly after running into this issue. Most people, from research, have stated that the 3rd party and free Ross-Tech software is all most people need.

As for the maintenance, it was all done at an Audi shop for major work (timing belt was the last thing done which was 20K miles ago). I do hear a whine when I first start up the car in the morning, could this be the SAI?

[Vinnie981]

I bought the car for $3800 a few months ago, shortly after running into this issue. Most people, from research, have stated that the 3rd party and free Ross-Tech software is all most people need.

As for the maintenance, it was all done at an Audi shop for major work (timing belt was the last thing done which was 20K miles ago). I do hear a whine when I first start up the car in the morning, could this be the SAI?

get the real deal from ross tech....its worth it.

[Vinnie981]

also what car do you have?

[HuskerNation]

also what car do you have?

Crap, I totally forgot to post that. Its a 2000 Audi A6 2.7

As for the real deal, the tool and software, or just buy the license?

[redneck truck]

Worth getting the cable I think.

Inspect all hoses. Don't know how they're routed on 2.7t but on my 4.2, both the big hoses that channeled the fresh air and the vacuum hoses that controlled the kombivalves were deteriorated.

Still, the get sensor requires immediate attention irrespective of anything else; your software is detecting a component or wiring failure

[HuskerNation]

I will definitely check the hoses first. If those are fine, what should be the next step? Clean it before it seizes?

As for the sensor, #1 is on the passenger side? I looked up images, and have an idea of what it looks like. Could this cause a misfire on the first 3 cylinders?

[redneck truck]

Why don't you inspect both of them? Unplug one at a time and see which one throws a code for the other and which one has no effect. Inspect the wiring and the connector, swap them across banks to see if the problem moves banks (assuming the parts interchange). Once your EGT sensor code is gone, continue troubleshooting. You've already identified one possible culprit; why ignore it just in case it's not THE problem. Fix it, just in case it is.