R34 Problem Error Codes 26 And 43

[mxtcy]

I posted this in Specific Auto discussion, but i know there are some wise people who don't alway check in there so i thought i would try my luck here too.

So i think i have a coil pack problem, i did a quick search through the posts on here and it seems as if this is the go but i thought i would just make sure and ask others if they had the same things happen.

This has only happened to me twice, both in the last month. The first time i had just got out of the drive way and all of a sudden the TCS and SLIP dash lights came on as did the check engine light. The check engine light went off, but TCS and SLIP stayed on. The car still drove fine, so i got where i needed to go and then shut the car off. When i came back to the car i turned it on and it started no problems, but the A/T (Auto/triptronic) light started flashing, it flashed a number of times and then went off. After that i drove the car around no worries then yesterday i got in the car turned it on, reversed down the drive way and as i reached the bottom the TCS and SLIP lights came on again and stayed on, and the check engine light came on and then went off. I drove the car back up the driveway and turned it off. I then turned it straight back on and the A/T light flashed a number of times (16 i think i counted). I turned it off, then back on and it started fine, no warning lights at all.

As i said i think it is a coil pack problem from what i have read, the car is going in for a service Wednesday (in 2 days) so i want to get the problem fixed then. So i'm just making sure this is the problem and that others had the same type things happen to them. Also how did others work out which coil was bad?

*****EDIT******

I ran a Self-Diagnostic and got Error Codes

26 -----Turbo Pressure Senor Signal Circuit: Turbo pressure sensor output voltage is aprox 4.8V or greater open circuit or less than 0.06V closed circuit for a predetermined time.

43----- Throttle Position Sensor Signal Circuit: Throttle position sensor output voltage is aprox 4.7V or greater open circuit or less than 0.06 short circuit for a predetermined time while park/neutral position switch is OFF and vehicle speed is 4 km/h or higher.

So aparantly these are my problems, but i have also heard of people having coil pack problems and the 21 code not showing up and them getting other fault codes instead. Yet when the coils were changed the other issues went away. Has anyone had these fault/error codes on there 34 before?

Cheers

Sean