So I recently replaced my Cam Shaft Position Sensor (Bank 2) on my 2003 Maxima SE after a scary incident that occurred about 3 weeks ago. Since replacing the sensor myself, I noticed the car is back to it's normal self (no driving issues) although I did notice it takes a couple of seconds longer to start. This would go on for about 3 weeks until the other day my check engine light returned. I immediately thought that maybe it was the new sensor that I just put in. (It was OEM by the way). So off I went to Auto Zone and they did a scan and told me I had P0021 and P1610 Codes. First thing I checked was my oil level and it was within spec. I had just did an oil change about 3 weeks ago using Penzoil Platinum full synthetic. So now I'm not sure what to check. I'm thinking about replacing that cam shaft position sensor again because I was a little suspect with the longer cranking time. Anyone know what else that I can rule out myself before replacing the sensor or bringing it to a mechanic? Thanks.

P.s The P1610 code is anti-theft (Nats) failure. I don't know what that means but my factory alarm seems to work fine. Maybe this has something to do with the Viper alarm that I had recently uninstalled? Both anti theft systems did seem to work fine when they were both installed. I don't think this code is really an issue but if someone wants to chime in that be great.

 

bump

 

Bump on very old thread, I'm having the exact same issue.