As I slow to either park or come to a stop at a traffic light the car stalls. The Check Engine light also came on today, (which I will). But what is "SLIP?"

My cities roads are a filled with tons of bumps and small potholes making the road very bumpy but I think it's excessive and I'm feeling it more than I should be. Probably needs wheel balancing and alignment -tpms light stays on when tires have correct air pressure but my back left tire deflates extremely slow with no evidence of a leak -Someone told me that the power steering might be going out but I haven't noticed that. Maybe unrelated issues: -check engine light is on. Probably an issue with either my 0² or MAF sensor, or my drivetrain. Haven't run diagnostic yet but I'm pretty sure that's what the problem is. -The car also squeals (sounds like a belt), when the engine cranks and is still idling but almost stops;significantly becomes quieter when I put it in drive. Then gets a little louder when accelerating or turning but is usually gone after the car warms up(after about 5min of driving), except on small occasions, when I turn or accelerate from a stopped position like a light.