Got codes before and after flashing, but car is running ok

[silverf0x]

Plugged in my Unitronic flash@home device today (going for my first oil change later) to flash back to stock. It was my first time using the software to flash.

Before the flash I had a code (don't know if it was pending or not): P310B

After the flash I had codes P1680 and P1568 (the previous one was gone).

Anything to worry about? Car was running great before the flash. Didn't tried it after (yet). Should I?

Car is a '15 S4

[SwankP3RF3ct10n]

You need to call and talk to Unitronic. The first one is a fuel pressure code, could be the tune or could be one of the pumps flaking out on you or not being strong enough from the factory for some reason (some newer B8.5 cars used to have issues like this a year or so ago with one of the other tunes from another vendors). The second code is not a good one and pertains to the flashing of the ECM from what I can find. I'd suggest calling Uni and see what they say. ALWAYS call the tuning company if you have issues after a flash or even before if you're running their product. That said, since the second code has to do with ECM flashing fault (from what I can find), you can try reflashing back to your tuned stage and then starting the car and then flash back after driving it for a bit to recharge the battery back up to acceptable flash levels. You can't let that go down too much while you're flashing. Also, if you haven't been told already, turn off the interior lights, the headlights and anything else taking electricity while flashing. Don't turn off the radio, but mute it all the way and obviously, turn off the HVAC system in the car as well. None of that stuff should be on.

[silverf0x]

Drove around 50 miles with the codes on stock map, went well. Had the oil changed by the dealer (they didn't say anything about the codes, nor did they detect the Uni :)

Flashed back to stage2+, same codes

[TexasDfwS4]

You did get the pulley installed right. Do you run 93 octane? And clear all codes before flashing.

[silverf0x]

You did get the pulley installed right. Do you run 93 octane? And clear all codes before flashing.

Pulley was installed by a very reputable shop here in Montreal: VAG Motorsport. I always run 94 octane.

Will try to clear the codes to see if they comeback.

[joediesel]

I got both of these codes as well after i installed my ECS intake, was EPL stg 1 and TCU for months prior.

No CEL. Put back on my stock intake and cleared the codes and they have not come back FWIW

Although with what you are saying OP, maybe it was related to my tune and not my intake

[YouSlyDog]

I got both of these codes as well after i installed my ECS intake, was EPL stg 1 and TCU for months prior.

No CEL. Put back on my stock intake and cleared the codes and they have not come back FWIW

Although with what you are saying OP, maybe it was related to my tune and not my intake

Hey Joe did you get any luck from this? I just went from stock to Uni Stage 3 DP. Same codes. I created a tic for Uni to review, but they are closed for holiday. I flashed back to stock and the codes we're gone. Back to stage 3 same two codes came back.

Drove while the codes we're present, didn't feel any difference.

I read in the s5 3.0 forum that the P1568 lead to a bad TB. (https://www.audizine.com/forum/showt...tle-Body-Issue)Attachment 99340

Sent from my SM-N960U using Audizine mobile app

[Audi_here]

Guys.... Codes will be set when flashing your ecu. This is normal. Every single person that flashes their s4 gets these two codes. Nothing is wrong. During the flash the ecu looses communication with all other components. This is also the case with any make or model if you flash the ecu.

[Chris@EPL]

Guys.... Codes will be set when flashing your ecu. This is normal. Every single person that flashes their s4 gets these two codes. Nothing is wrong. During the flash the ecu looses communication with all other components. This is also the case with any make or model if you flash the ecu.

Not every person, these codes do not occur during a flash with our set up.