P0335 and P0725
2006 Nissan Sentra 1.8, 166500 miles
A couple weeks ago the check engine light went on. P0335 Crankshaft Position Sensor A was the recommended part based on the autozone scan. I purchased the part at Parts Authority. After a couple hours of trying to wrestle the old sensor out, I put the new one in. Tried driving it and shortly thereafter, check engine light came back on. Scanned it at autozone again and again the P0335 came up with a secondary P0725. Also, it usually now takes multiple cranks to fire up. Most cranks, a few seconds in, it will sound like its making heavy gasping sounds. Usually at this point, I turn it off and try again. When it does start, light is back on. What I've discovered is that if I disconnect the negative cable after I arrive to my destination, it usually starts back up much easier when I'm ready to operate it again. I do have an RPM spike in the 2nd-3rd gear change though. It will jump up sometimes about another 500rpms when it changes gears. Any ideas? Should I try purchasing another crankshaft position sensor? Wonder if Parts Authority would take the return and exchange. I think the P0725 was an engine speed sensor code. Help!
Always buy parts with a limited lifetime warranty.
Get a Nissan sensor aftermarket 9-10 times cause more problems than they fix and is the car a 2.5 or 1.8?