If the CPC valve is faulty, you would be getting the problem all the time, either cold or at operating temperature.
For transmission, actually the reverse is true of slipping. They tend to slip when cold and works well at operating temperature as pressure losses are reduced when components and seals heats up and expands.
Yours is slipping only when at operating temperature which is the reverse and I would lean towards a sensor fault. Sensors could be sending signals that are interpreted too slowly or slightly out of range and this could be a fault of the PCM or its software.
TPS, ECT, VSS, Linear solenoid, shift solenoids are all possible fault areas.
Saturday, March 17th, 2012 AT 12:45 PM