Three problems related to underhood wiring have been reported for the 1999 Volvo S80. The most recently reported issues are listed below.
Transmission problems causing dangerous driving conditions. The transmission slips when going between 2nd and 3rd. Also had issues with the engine going to 700 rpms when going 65 mph. This is just one of the many problems. The solenoid went out in the transmission about 13000 miles ago. Currently I have three different error codes "transmission service urgent", low oil pressure stop engine ASAP", and "emission service required". I have read many other people have the same problems I have had. Nm.
Underhood wiring harness is protected from heat/elements by a convoluted tubing. The convoluted tubing has become very brittle, turned to powder and fallen off the harness leaving the harness unprotected. Volvo is apparently using a tubing plastic underhood that cannot withstand heat! the wiring harness on my car is now left unprotected and will likely suffer premature failure similar to every other major system on this car.
Car was parked. Fire started under hood. Appears to be an electrical short. Car was considered a "total" by the insurance CO.