I have looked and looked for a Check engine soon thread...sorry if Im posting in the wrong place.
Anywho...The car Im looking to buy has ran 4 diff codes

P0500-Speed Sensor A Malfunction
P0325-Knock Sensor 1 Bank 1 or Sensor 1
P0600-Serial Comm Link Malfunction
P0105-MAP/BARO Circuit Manfunction

I have owned a 4th gen before and the light was on and Nissan told me it was some kinda sensor and just to drive it but Im looking to buy this car and I wanna make sure its isnt gonna break down on me when I buy it...Please please if anyone can help...

 

its likely that the electrical system needs an overhaul, get an estimate on how much it will cost to repair it and show it to who you want to buy it from and tell them to lower the price to compensate for the labor.

i'd fix the last 2 first since there is a chance the 1st 2 are caused by the later, who knows?

 

I personally wouldnt buy the car unless it is all fixed and paid for by the seller. there are lots of 4th gens for sale, id find one without all those problems. good luck on the search!

 

Those codes aren't run-of-the-mill trouble codes. When I read that list I begin to think damaged wiring harness. Wiring harnesses are NOT cheap, and they are usually either a lot of diagnostic labor or a lot of installation labor.

 

pass on this one