Automatic Transmission Control Module Problems of Porsche Cayenne

When merging onto a freeway or similar highway, the vehicle will sometimes just die in response when you hit the gas pedal to increase speed to match other traffic. This causes other to take avoidance action at highway speeds and on one occasion a semi nearly rear ended me.

See all problems of the 2004 Porsche Cayenne 🔎.

The contact owns a 2004 Porsche Cayenne s. While driving up a hill at slow speeds the vehicle will feel as if the transmission is going in and out of gear. This causes the vehicle to jerk, and makes it difficult to control the vehicle. This happens intermittently whether it is warmer or colder temperatures. The service dealer reprogrammed the electronic control module, , but this did not remedy the problem. The service dealer attempted to repair the problem numerous times. The attempts to repair the problem included, updating and the replacement of the transmission control unit. This still did not remedy the problem. The dealer reported the problem to the manufacturer, and they sent a technician to determine the problem. The technician reproduced the problem, and said that it was a condition of hill holder function which holds the vehicle in place to approximately 800-1100 rpms, at which it will start to engage the transmission. The manufacturer stated that this was a normal operating procedure for this type of vehicle when the vehicle wa scold. The contact requested for the manufacturer to submit the reason why this was normal operating procedures for the vehicle. The remedy from the manufacturer was for the contact to accelerate more when going up a hill. The second explanation the manufacturer offered was that the jerking of the vehicle was caused by outside temperatures. The California new motor vehicle board requested that the second explanation be put into writing, but the manufacturer refused. Another safety concern bothering the contact was that while driving and upon acceleration the vehicle will stall. When accelerating nothing will happen, the engine will completely lose power. The service dealer stated this was transmission control. , but the repairs did not solve the problem.

Vehicle hesitates 1 - 2 seconds before responding to accelerator pedal input. It is a serious safety concern when attempting to pass or crossing a busy intersection.