P0087 and EPC light after changing plus and coil packs. Uh oh

[Kemnik]

Hi all, just changed my plugs and coil packs on my 2009 S5. Took for test drive and my EPC light came on. When I plugged into VAG cable it said P0087 (Fuel rail / system pressure too low. I have no idea what I would have touched to cause this, but it has to be something I did. Any ideas?

only thing I'm mentally hung on is that I was pulling on the air cleaner box alot to make room and there was a wire connected to the bottom that (assuming) operates the flap for more air at higher RPM's. If I pulled and messed up that wire / sensor and the flap isn't working, would it cause that trouble code? Man I'm so mad cause I did something during this routine job and really don't want to tow it in somewhere.

Thanks for any advice!!

[Kemnik]

Nothing eh? yeah it's a weird one for sure. Well I'm hoping it was coincidence that it was right after I did the plugs and coil packs; cause there is no mis fire codes, only fuel system pressure too low. I'm taking to dealer on Wed, so I'll update the thread so others can at least learn from it. Praying it's covered under my silver package warranty. Seems like most things aren't unfortunately. Based on other threads, my guess is a HPFP sensor or the pump itself.

[Slobo7x]

What type of plugs and coils did you use? Did you disconnect the Fuel pump connectors when you did this?
This could be a coincidence that the pump failed at the same time you were done, might not be anything you did wrong.

[Kemnik]

What type of plugs and coils did you use? Did you disconnect the Fuel pump connectors when you did this?
This could be a coincidence that the pump failed at the same time you were done, might not be anything you did wrong.

Thanks for the reply. I did use OEM parts and didn't touch either of the two HPFP's. Update though...when I took it to the dealer they confirmed a bad fuel pump and replaced both under warranty. I guess you are supposed to replace both. Been running fine since then. Was good to know the plugs and cool packs weren't hard to replace.

[Slobo7x]

Glad it worked out man, warranty is a great piece of mind to have. ;)