2005 Chevrolet Equinox LT 3.4L with engine code P0520

Question

I have a 2005 Chevy Equinox at times looses compression while driving and bucks also it will turn over but not start or just start and stall when in reverse. this is an issue that does not happen often so the mechanic can't find the problem a p0520 error code came up the last time can the oil sensor cause this issue don't want to just throw parts at it

Answer 1

P0520 Engine oil pressure switch

Stall in reverse? Looses compression while driving. ? On different year makes and model , yes the P0520 would affect the perfromance of the TAC (throtle actuator control). But being a P0520,  on a 2005 it just a oil pressure switch that reports to the instrument panel. If the vehicle bucks at time and stall with a difficult time starting, and stall when put in reverse the  fuel pressure should be check With the KEY ON ENGINE off the the fuel pressure should be at 50-60 psi.

Answer 2

P0520 Chevrolet Code - Engine Oil Pressure Switch Circuit
Read more: https://www.autocodes.com/p0520_chevrolet.html