About a week ago I started getting a smell through the ventilation like the smell of the contacts on an electrical racecar taken right off the track. It's present with & w/o the fan on and when you switch to either floor or defrost or a/c it turns on the compressor. At this point a noise starts being made, not the belt though, it's a back pressure noise (near the firewall where the heat and a/c hoses punch throught the firewall) which will kill the car if at idle but not immediately after a cold Colorado morning start. Back to the smell...I opened the power steering fluid reservoir and the fluid smells the same as my weird ventilation smell but I don't appear to be losing any fluid according to the fluid reservoir level indication lines, in fact the reservoir indicates it's been overfilled but I didn't overfill it, nor have I replaced it ever...hmmm...ever. Not sure if this is related so please don't get blinded by the indicator light but I have had, for a long time running, the P0126 check engine light indicating for a while too...any info on both would be appreciated. Thank you.