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Hi Loren or anybody out there

Vehicle: 2004 Porsche Cayenne S with over 114,000 miles.

Problem: I am getting “PSM Failure - Workshop" message often immediately followed by sluggish gas pedal and ultimately slowing the vehicle to a point it is not moving.

What I have done so far:

  1. I replaced a brand new battery yesterday just to be sure. But not result.
  2. I would clear the codes using Durametric, and after few miles (intermittent) the problem occurs again.

Following are the Actual values From Durametric Engine section while pressing and releasing gas pedal:

Throttle-valve potentiometer 1 = 15.23%

Throttle-valve potentiometer 2 = 80.85%

Pedal-travel sensor potentiometer 1 = 14.0%

Pedal-travel sensor potentiometer 2 = 7.03%

Potentiometer 1 voltage emergency air = 0.78V

Potentiometer 1 voltage lower stop = 0.52 V

Potentiometer 2 voltage lower stop = 4.4 V

Throttle-valve angle potentiometer 1

Throttle-valve angle potentiometer 2

Pedal value = 0%

Throttle plate angle load signal = 0%

Throttle angle actual value = 0%

Throttle angle nominal value (adaptation) = 0%

Could you please help me understand what going on and direct me to any usful repair procedures.

I appreciate your help.

Thank you

Chamilka, firfax VA

Edited by chamilka
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