C2 Tuned VRT; error 17796 P1388 Internal Contr. Module drive by wire error

[R32Smoker]

I've been having a few issues with my VRT,; the ECU fried on me while driving last October. The car just died out and wouldn't restart, had to replace the ECU and fuel pump relay after about a month of trying to figure it out. New MAF and spark plugs, ngk bkr8, also.

The new ECU got it up and running again, It's been running OK, but it has been idling funny and dieing out on me alot latley. It will restart first try every time and idle perfect for a while, than after driving for a bit than coming to a stop, it will idle funny and want to die out again.

I scanned it with VAGCOM and got these 2 errors

17535 P1127 fuel trim; Bank 1: system too rich
and
17796 P1388
Internal Contr. Module drive by wire error

Any ideas what I need to do?

[R32Smoker]

So I guess I'm looking at replacing my throttle position sensor, though from looking around it seems I have to buy the entire throttle body? Why does ECS tuning sell just the sensor if you can't replace it without changing the entire throttle body?

[R32Smoker]

Quick update, the car has been stalling out when coming to a stop. Now the car will not start at all. I took it to a shop, and they're telling me I need a new ECU, but I just replaced it 3 months ago! If I do get another one it will be the 4th ECU for this car. What would cause my ECU to just crap out? Has anyone had or heard of this problem before? Please help me out before I push this car off a cliff

[vwmaniac16vr6]

sounds like an error in the coding /programming of the ecu, i would hit up C2

[llanowar]

u havent opened the ecu up right if u touch the inside of the ecu it will burn it up shortly after like light bulbs.
id say ur grounds for the car are in need of cleaning lack of of continuity causes shorts which increase temperature /fry


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[R32Smoker]

The ecu was flash loaded, so I never opened it. I did have a loose ground which I tightened up before the last ecu was installed. If it is a coding error wouldn't the car not run at all?

[JohnStamos]

C2 has ALOT of issues with ICM error codes and Internal rom error codes on Mk3 platforms, but I haven't seen it much on Mk4's.

[typeSLone]

Assuming this is a mk4, have you checked your accelerator pedal? I've seen a few of them go bad over the years.


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[R32Smoker]

Assuming this is a mk4, have you checked your accelerator pedal? I've seen a few of them go bad over the years.

I don't think this is the case because the car will start sometimes and I can get response by stepping on the gas, but it will only idle for about 10-15 seconds before dieing out, then it won't restart.

I'm waiting on a response from C2 about the error code, in the meantime I'm having it towed to a dealership to have them double check all my grounds/wiring and do a pressure test/check for vaccum leaks to rule out any other variables. I hope I don't have to resort to another tune, I want to go Lugtronic, but it's out of my budget.

[typeSLone]

I fully suggest lugtronic but I understand it being out of the budget.

Curious what C2 says? Did you try adapting or setting basic settings on the throttle body at all? I've seen a few older dbw cars with bad throttle bodies that would idle for a few seconds then die out.


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[R32Smoker]

C2 said it looks like either my ECU is going out, or I have a problem with the wiring to the ECU.

The last time my ECU went out it actually fried; I had a loose ground and the ECU put out like 8 error codes about short to ground in all the injectors. The ground was fixed and a new ECU and fuel pump relay was installed at the dealership.

It has been running well the past 4 months except for occasional stalling out at idle, it would always start right back up though. This is the first time I scanned the new ECU since it was installed, so this 1388 code could have been on for a while now. I actually did buy another throttle body to try out in case my TPS sensor is going bad, haven't had a chance to install it yet.