2011 Nissan Altima Hybrid Stutters/shuts off at stops
59k miles and have had it for 2.5 years without issue.

lately, it's been stuttering and then shuts off at stop lights. in electric vehicle mode it drives fine. but when it shifts over to gas man it stutters and wants to shut off. i changed the 12v battery already. but i've read online that it can be a crankshaft position sensor and/or camshaft position sensor issue. and i just need to change that? does anyone know where it's located and can i change it myself? it's not throwing any codes. can it be the fuel pump?

thanks

 

and it's not throwing any codes at all..

 

I don't know if this will help, buy my 2007 with 100K miles had been stuttering (but not shutting down) during the transition from EV to gas. I changed the spark plugs and it is back to normal.

 

I'm going to change the spark plugs. but i fear it's the carbon build up issue. i'm 56k and 2011 so not sure if i'm still under warranty, since i have a salvage title.

if it's the carbon build up issue, can i do seafoam? i can't afford to pay the 3k to change the cylinder head.