I got a code p1065 CPM backup circuit malfunction. I tried to reset the ecu and it dosent fix it. As i drive it runs rough at low rpms/startup and the check engine light blinks and sometimes dosent blink. Anyone know what could be the problem?

 

http://lmgtfy.com/?q=code+p1065+site%3Amy350z.com

 

One pin of the ECU is hot-wired to the battery to keep certain memory functions alive, even with the ignition OFF. A P1065 DTC means that the ECU isn't seeing the proper voltage at this pin. There could be a problem with the fuse, the wiring harness, or the connector, or the problem could be in the ECU itself.

 

This problem has occurred before if you have a scanner and clear the code it should take care of all problems. I've had that happen before and this is what fixed it. Have you had your battery disconnected for a while?

 

I tried clearing the code but it keeps comming back. Ill take karlts advice and go from there. Hope I dont need a new ECU LOL

 

Damn that sucks. Maybe try to reset the ECU by leaving the battery unplugged for a while. If all else fails Nissan could use their consult machine to pinpoint the issue. Idk even how much an ECU costs these days lol

 

The same thing happened to me and yes I did had the battery disconnected for about a week. Did the throttle position relearn now SEL comes on when I accelerate any Ideas?