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Code P0643 plz help 911

649 Views 11 Replies 5 Participants Last post by  Paulsxterra4x4
My xterra threw this code and now is in limp mode I changed the fuel pump alrdy and next going do the timing chain and new radiator stuff also has anyone ever came across this before in there xterra mine is a 2008 xterra s model with the 4.0 I'm it any ideas what could it be I going to replace all injectors after timing and everything I got more money for cheap parts than I do for labor any ideas ty very much glad to be part of a group I'm clif btw
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Yes it's new battery
My xterra threw this code and now is in limp mode I changed the fuel pump alrdy and next going do the timing chain and new radiator stuff also has anyone ever came across this before in there xterra mine is a 2008 xterra s model with the 4.0 I'm it any ideas what could it be I going to replace all injectors after timing and everything I got more money for cheap parts than I do for labor any ideas ty very much glad to be part of a group I'm clif btw
Ty I will try to find the other grounds I know the ones your talking about that's by the vvt timing sylanoids it's it those I slrdy cleaned those ty for you guys trying to help me too btw
Yes it's new battery
Can you guys look it up and plz help me find out why my x won't rev up past 2k roms and I can drive it again ty so much
Can you guys look it up and plz help me find out why my x won't rev up past 2k roms and I can drive it again ty so much
I've changed the fuel pump the battery the timing chains was my next step and ordered all new sensors and new radiator BCS of the mod thingy I hope to be able after all this to just drive my x long time ty guys again try help me
I can look it up when I get to work. I’ve only seen this code once before if I remember i think it was on a Titan. Some other shop had done a bunch of work and there was a ground issue on the sensor circuit when I was done. I don’t know if I ever found the issue I think I just tied a ground near the ecm because they didn’t want to pay. I’m sure there was a ground eyelet not secured or a loose ground bolt but I never saw the car again. I think I measured the power steering pressure sensor ground wire and found 5v which means open ground. This was a long time ago
Ty I'll check that
Ty I'll check that
I'll check the power steering sensor and try check all the grounds it's great to have a buddy that's a mechanic I am mechanic but not very good comes to wiring ty for all your help I'll b needing it bfr this is through ty again
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