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Discussion Starter #1
Got the Treg back from the dealership a few days ago after new pads/sensors/rotors, a new throttle inlet boot pipe, and a detail. Drove fine until today. When trying to start the car it is throwing an ECS Fault, Transmission Fault, Airbag Fault, Glow Plug Fault, and an Adaptive Lighting Fault.

Sounds like someone might have mucked something up. Maybe a wire harness or ???

I wanted to get your opinion on the matter. I'm definitely calling the dealer first thing in the morning. They kept it for four days, claiming they were waiting for the inlet boot pipe to come in the mail and that it was dangerous to drive with a small oil seep coming out of the old inlet boot pipe. I'm starting to get suspicious that they screwed something up, didn't tell me, and it took them a couple days to get it to work.

Full disclosure: Malone stage 2 software and Rawtech DPF/Cat/DEF delete. I was considering attempting a re-install of the Malone tune just for fun, but figured it probably would not have started if they had messed with the software. I told them about all this before they began work, but it's not the first time they didn't listen to me. I had a Tiguan with APR stage 1 tune that they overwrote after I explicitly told them not to.
 

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Discussion Starter #2
I neglected to mention that the tachometer cut out the last time it ran and the engine seemed to be idling at higher RPMs than normal. It wont start at all now.
 

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Wait, wait, wait...... so your dealer of choice already caused you headaches in the past on previous modified vehicles, but you took your current modified vehicle to them this time around too? Interesting........

With regards to all your faults, I'd definitely give it back to them to fix, and being that it's a '13, you should be covered for mostly anything under the extended emissions warranty..... but I don't know how you'll invoke that coverage given your mods and full disclosure.

Keep us posted.... many of us are weary of doing any mods for fear of this kind of situation while still under the coverage.....
 

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Discussion Starter #4
Wait, wait, wait...... so your dealer of choice already caused you headaches in the past on previous modified vehicles, but you took your current modified vehicle to them this time around too? Interesting........

With regards to all your faults, I'd definitely give it back to them to fix, and being that it's a '13, you should be covered for mostly anything under the extended emissions warranty..... but I don't know how you'll invoke that coverage given your mods and full disclosure.

Keep us posted.... many of us are weary of doing any mods for fear of this kind of situation while still under the coverage.....

Thanks for your constructive comment :roll:

Sorry if I was misleading. I don't have a lot of choices where I live and figured loyalty is worth something. I've been taking my Volkswagens to this dealer for ten years now. They've messed up once and owned it.

I was fully aware of what I was doing when I installed the mods and wont be trying to invoke voided warranties. If you mod your car in this manner, kiss the warranty goodbye.

Not trying to rip off Volkswagen. Just want my car to work :wink2:
 

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Discussion Starter #5
I just checked all the fuses in the driver and passenger side fuse panels and didn't see anything blown. Does anyone have any ideas? I did notice the panel under the glove box in the passenger foot well was loose and a screw was on the floorboard. Is there anything up in there that would be a common denominator between all the issues i'm seeing?
 

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Without a VCDS scan, I can't think of too much to add.

VW will not work on a vehicle with a tune. The best case is that they flash it back to factory and then fix it under warranty, without charging you for the free update.

Not much use asking the dealer not to flash it. VW HQ pretty much demands them to flash it.

With the way the dealer computer is now 24/7 hooked to the VW mothership, the diagnostic software might even refuse to do anything except demand a flash as step one.

Make sure the battery has a full charge and look under the hood around the air intake. Make sure that all the wiring harness appear to be connected and fully clicked together. I could see many of these codes appearing IF the dealer had unhooked a engine wiring connector, half way plugged it in, and the connector then vibrated loose.

Follow the wires from the glowplug back as far as you can. Ditto for the Air Intake.

That's all I got folks. Good Night.
 

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Discussion Starter #8
Without a VCDS scan, I can't think of too much to add.

VW will not work on a vehicle with a tune. The best case is that they flash it back to factory and then fix it under warranty, without charging you for the free update.

Not much use asking the dealer not to flash it. VW HQ pretty much demands them to flash it.

With the way the dealer computer is now 24/7 hooked to the VW mothership, the diagnostic software might even refuse to do anything except demand a flash as step one.

Make sure the battery has a full charge and look under the hood around the air intake. Make sure that all the wiring harness appear to be connected and fully clicked together. I could see many of these codes appearing IF the dealer had unhooked a engine wiring connector, half way plugged it in, and the connector then vibrated loose.

Follow the wires from the glowplug back as far as you can. Ditto for the Air Intake.

That's all I got folks. Good Night.

Very helpful, Thank you!
 

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Discussion Starter #9
Well, I had it towed to the dealer. They confirmed the battery is OK and told me it's a 'CAN-BUS communications problem'. However, they have no idea where the issue lies - a bad connection, broken wire, could be anything. I asked if they unplugged anything when they did the work on it last week and they assured me they did not. They also say they did the good-old tug test on everything they touched. They also said it's likely not related to the ECM. I gave them the go-ahead for a few hours of diagnostics and troubleshooting.
 

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Without a VCDS scan, I can't think of too much to add.

VW will not work on a vehicle with a tune. The best case is that they flash it back to factory and then fix it under warranty, without charging you for the free update.

Not much use asking the dealer not to flash it. VW HQ pretty much demands them to flash it.

With the way the dealer computer is now 24/7 hooked to the VW mothership, the diagnostic software might even refuse to do anything except demand a flash as step one.

Make sure the battery has a full charge and look under the hood around the air intake. Make sure that all the wiring harness appear to be connected and fully clicked together. I could see many of these codes appearing IF the dealer had unhooked a engine wiring connector, half way plugged it in, and the connector then vibrated loose.

Follow the wires from the glowplug back as far as you can. Ditto for the Air Intake.

That's all I got folks. Good Night.
My dealer sells flashes. Not sure if they would flash a TDI but they advertise tunes there, and not just the warranty covered ones from APR.
 

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My dealer sells flashes. Not sure if they would flash a TDI but they advertise tunes there, and not just the warranty covered ones from APR.
Wow. Learn something new every day.
 

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Discussion Starter #12
Dealer called. Said it was the ECM after all. I have not seen any pictures yet, but they said water had gotten inside and corroded everything. They found a mess of sealant and mismatching screws trying to hold it together.

Years prior to getting the emissions fix done, I had taken it to a local APR reseller for a stage 1 tune. I remember them taking a day or two to install the tune because they had to remove the ECM. I called APR and told them of the dealership's claims. They have requested the start of a paper trail. Im waiting for the dealership to send me pics of the corrosion, sealant, and screws which I'll forward to APR and post here.

If APR or the reseller don't pony up and offer a fix, I'll need a new or used ECM for the dealer to pair to my car. Then, I'll have to see if Malone can help me out with a new flash to get it back to the way I like it. Luckily, I still have all the parts I took off for the delete if I need to get it running on the new to me ECM, pre-tune.

Sent from my SM-G960U using Tapatalk
 

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Discussion Starter #18
VW is saying I need to find part 7P0990990B. I'm not finding anything used with that part number, but I did find a used 7P0907401K for $319 which seems to be superseded by 7P0990990B. I'm reaching out to Malone today to see if they have any advice.

The dealership says my options are
1. Bring them an ECU with the tune installed, pair it with my immobilizer, I can be on my way
OR
2. Bring them a stock ECU, re-install all the emissions crap, pair it with the immobilizer, install all the recalls i've skipped, then I can take my happy ass to another shop to get it all removed and re-do the Malone tune.

I'm leaning towards option 1 as being the best, but will wait to see what Malone has to say about it. I'm wondering if I can just use my old files and flashzilla on a new ECU after it's been paired with my immobilizer.
 

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Discussion Starter #19
Sorry to dig this up again, but wanted to share the final outcome.
I purchased the used 7P0907401K from ebay to replace my corroded 7P0907401K.
Malone hooked me up with a bench flash on the new ECU to disable the immobilizer software.
The dealer installed the new ECU, paired the key to car, then installed the latest software that the mothership had on my file for my engine/transmission/accessories, etc...
Suprisingly, at that point it ran like a stock Touareg. It was throwing a check engine light, but that was not bad considering the rawtech dpf/adblue delete.
Malone hooked me up again by swapping out my flashzilla with the old stage 2 with a new flashzilla. With the new flashzilla, I grabbed the stock file off the new ecu and sent it to Malone. They did their stuff and sent me a new tune.

It worked like a charm! $700 dollars of parts and labor later, the car functions even better than before. Winter fuel finally sold out and with the summer mix it's now averaging 30 MPG for the tank. That's just over 700 miles, but I think I can get more out of it. Towing is also improved with about 15 MPG while towing a 18 foot 3500# travel trailer at 65 MPH. Before, I was getting about 28 average and 10-12 while towing the same trailer.

I extended a huge thanks to my dealership and apologized for being a dipshit. I'm also very appreciative of Malone Tuning for getting me set straight and for putting up with my stupid questions.

Yay, happy ending!
 

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You could try cleaning the corrosion and go over the solder joints with a soldering iron. I'd be willing to bet nothing got fried, just needs a cleaning and reflow.


Sorry to dig this up again, but wanted to share the final outcome.
I purchased the used 7P0907401K from ebay to replace my corroded 7P0907401K.
Malone hooked me up with a bench flash on the new ECU to disable the immobilizer software.
The dealer installed the new ECU, paired the key to car, then installed the latest software that the mothership had on my file for my engine/transmission/accessories, etc...
Suprisingly, at that point it ran like a stock Touareg. It was throwing a check engine light, but that was not bad considering the rawtech dpf/adblue delete.
Malone hooked me up again by swapping out my flashzilla with the old stage 2 with a new flashzilla. With the new flashzilla, I grabbed the stock file off the new ecu and sent it to Malone. They did their stuff and sent me a new tune.

It worked like a charm! $700 dollars of parts and labor later, the car functions even better than before. Winter fuel finally sold out and with the summer mix it's now averaging 30 MPG for the tank. That's just over 700 miles, but I think I can get more out of it. Towing is also improved with about 15 MPG while towing a 18 foot 3500# travel trailer at 65 MPH. Before, I was getting about 28 average and 10-12 while towing the same trailer.

I extended a huge thanks to my dealership and apologized for being a dipshit. I'm also very appreciative of Malone Tuning for getting me set straight and for putting up with my stupid questions.

Yay, happy ending!
 
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