C32 hunting and occasional ESP warning

[Dazzler]

Anyone come across a C32 that sometimes hunts?
First start and drive of the day is faultless.
Only once been used will it sometimes play up.
The engine revs bounce up and down and the car is undriveable.
Occasionally this will also flag up a ESP warning.
A few ignition off, lock car, unlock and restart will cure it and all is well again.
Bizarre

 

[mioba]

Standard answer: Have you had the codes read.

 

[Uncle Benz]

Sounds like throttle body, but a code read will help

 

[Dazzler]

Sounds like throttle body, but a code read will help

My thoughts were along those lines.
Waiting for it to fail a few more times as the codes were deleted

 

[Dazzler]

P202E-808 deflection of throttle valve p0120
P2032-808 throttle valve potentiometer
P2007-004 b28 pressure sensor electrical fault.

 

[Uncle Benz]

The map sensor b28 is on the corner of the chargecooler core, just under the throttle body. Maybe have a close look at the wiring in that area