idk where to start. 2 days ago my 2005 g35 coupe rev up took a ****. i was driving to a buddies after work and when i went to leave the car would turn over but not start. i had gas and i knew it wasn't battery related but tried to jump anyway and had no luck. code ran it and got these 4 codes
p1446
p0335
p1078
p1084
did some research and figured it was crank shaft position sensor so i bought a oem one off of z1 and installed the new sensor. (i did this with battery disconnected) after new sensor was in i tried to start car and same issue. it will turn over very slowly and i dont keep it turned over bc i dont wanna fry my starter. i know the other codes (p1078,p1084) refer to exhaust valve timing sensor and dont know if this could be the root of my issue. I also know or think that the p1446 is related to a evap canister vent control valve which i have known about for a while and the cars been drivable w no issues. Very confused and would love some help

 

Currently got same/similar the same issue with my revup.. it’s gotta be an electrical short or something somewhere.

following this thread and will keep posted if I find any solutions..

 

i agree. the p1078 and p1084 are cam sensors which im going to replace tomorrow. not expecting much but i have the sensors so gonna see what happens. will keep you posted.

 

did replacing them solve your issue? I replaced all 4 of mine oem and still had issues.. few days ago I took all the loom off the harness expecting a melted or broken wire, didn’t find anything..

I could wiggle around the connectors and sometimes get it to fire up, depinned the connectors and nothing wrong with em..

ended up cleaning all the relays in the ipdm, added a ground from battery to plenum. Unplugged the ecu and blew out the big ah connector and now my issue is gone.. starts first crank every time and no lights.

Not sure which one really solved it but could be something for you to try.

Best of luck

 

I am just posting so I can keep track of this thread.

 

Just an FYI that others may also benefit from: You can just click the "subscribe" button top or bottom of the thread to keep track of it; no need to post....

 

Don't know if anyone is still active in this thread but hoping for help. I had previously posted about 6 months ago about my car getting 4 codes and not being able to start. Turns out 3/4 of those codes were related to faulty cam sensors that as soon as i replaced the codes turned off and it did the trick. The code i still have and have had since i bought this thing is p1446 feels like the code of death. It refers to a evap vent control valve which i have since replaced and still have the same issue. When filling up the gas tanks clicks at half full and doesn't like having anymore gas put into her. This tank makes absolutely zero sense to me. I've tried releasing pressure in the system, and even cleaning the whole system with q tips which was recommended from a previous thread titled "Gas Gauge WEIRDNESS" . When i first started having this problem about 8 months ago i just said **** it and bought a new fuel pump which was a pricey expense. Replaced it myself and it works great. But still have this stupid problem and CEL. Apparently this issue has been happening since 2007 from previous threads and there was some recalls i've heard but don't know how true it is. Would love some help.... Really don't wanna have to rip apart the entire evap system. 😬😬

 

I would definitely replace the EVAP vent control valve again with an OEM replacement if you haven't already.

Start from there.

 

Hoses as well.