95 850 Turbo w/ 148k. Ok, i have some weird stuff going on, and i dunno if they are all connected or not. It all started with fault codes in my heating system, one of them being about the circuit being below 12 volts or something. But then the next day I had my headlights and dash lights on, and shut the car off, came back and started, and for some reason after the engine started the dash didnt come back on and i could not shift from park for about 5 seconds. A few hours later the check engine light came on, and i noticed that the engine was hesitating when i floored it. Also, after starting a couple hours later, when it idles it is shaky, almost like it wants to stall. I then went to the ecu and check socket A2 - the faults i got i cant find definitions for, in haynes or online. The codes i got were: 4-5-5, 5-3-3, 5-5-5, 5-4-3. I found the codes for the Phenix 5.2 injection system, but 20v turbos use the mototronic 4.3 as far as i know??? Im thinking that im reading way into the problem, maybe its my distributor cap/rotor or spark plug wires? I'm hoping it wont be a $150+ O2 sensor. IM sending it to a volvo dealership, as i don't really trust a regular mechanic with the computer if i can't find the codes. If anyone knows something similar I would appreciate the Help. Thanks