Hi, i read an old post on how to recalibrate the throttle on the pedal and the throttle positioning sensor on the throttle body so that they sync up. It was something to the effect of, turn key to position 1, push the gas pedal down for 25 sec and reslease the pedal for 10 sec and then start the car?? Supposed to idle really rough and then snooth out i guess..
I am trying to figure out what is causing my throttle positioning sensor codes and making my car go into limp mode so erratically. I have swapped throttle bodies and checked the integrity of the bypass valve so far. Looking for more ideas now.

 

Mine's doing the same thing and going into limp mode.
Recalibration: Is that needed? Where's the post?

FYI:
My 03 R53 has P1125 (TPS small plausibility) and P1229 (Adaptation).
If I had a problem with the pedals, P1124 would show.

In the back of the Bentley service manual, there is Diagnosing without Guesswork
I'm looking at page 13-64 (shows testing procedure)
My notes that I wrote on that page in the book references
other pages: 13-22 (the DTC codes), ELE-108 (WD) 13-57 (shows WD and EDR)

Using stick pins from a new shirt, I backprobed the connectors.
My 1" pins go in through the back of the ECM 81 pin connector (X6000)
along side the wire. I'm not poking through insulation. The stick pin doesn't
touch the X6000 pins until about 5/8" inside and the stick pin pokes out of the
back 3/8" before I have connectivity between the stick pin and the other
side of the X6000 connector (the ECM side)

I've unplugged the ECM and the EDR and verified wiring harness continuity.
X6000(pin10) <--> X6390(pin1) TPS1
X6000(pin11) <--> X6390(pin4) TPS1
X6000(pin12) <--> X6390(pin6) TPS2
X6000(pin13) <--> X6390(pin2) TPS2
I still need to check these two:
X6000(pin65) <--> X6390(pin3) Throttle motor
X6000(pin63) <--> X6390(pin5) Throttle motor
Run the 13-64 tests at KOEO (no throttle, full throttle)
Run the 13-64 KOER tests @2500 rpm.
We'll see what voltages I get.

 

Have you tried a plain ol' hard ECU reset by disconnecting the battery?

 

Hey muddflapp, you are definitely more thorough than i am. I have only owned the mini for a few months now. I didnt start having the issues right when i bought the mini but it has been getting more and more common recently. I wasnt able to find the post i was talking about, i will keep looking. After doing many searches via google and on NAM, i had looked at the wiring leading to the throttle body, examined the pins to see if they are loose or bent, swapped throttle bodies, examined the bypass valve for spring integrity issues. What else can i do to try and diagnose the issue? Could it possibly be the ecu or connections to the ecu? I hate the thought of taking a vehicle to a mechanic but am on the verge recently. Never taken a vehicle to the mechanic or dealer before this mini :/.

 

Have you tried this?

https://www.northamericanmotoring.co...ni-viagra.html

Good luck!