Mikegconigs

so i was drivig city speed n all of a suden my 2003 350z was acting weird like it was gunna stall twice. The all three lights came on ses/tcs/slip. I thrned the car off started it fine drove fine. After i turned it off again the two tcs/slip light went off and the ses light stayed on. I took it to autozone and did the code reader and it said camshaft and knock senor low. The car drives fine and i remebr when i first got it. I was doing some radio work and The ses came on and it said knock sensor i had the code cleared and it never came back. Ive been reading online and some people have said that it was just a computer malfunction. Im asking for opinions. Thank you

zakmartin

Are you using premium fuel? I saw the "popping noise" issue on your other post and I'm tying that into the knock sensor code your car threw and it might be a detonation problem. Are you filling the car with the recommended octane-rated fuel? When was the last time the plugs were changed or any maintenance/diagnostic was done to the ignition system?

There are a bunch of posts re: the tcs/slip lights, and whether that issue can be correlated to the sensor PIDs you got off the code reader can be researched on this site using the search function.

JMII

My '03 camshaft sensor failed 3 months ago. Similar symptoms... if the sensor is going out then your problem is not going to go away, in fact it will only get worse. Thankfully its a pretty easy (and cheap) fix to replace the failed sensor.

More information and DYI in this thread: https://my350z.com/forum/engine-driv...l#post10916407

Sorry no advice on the knock sensor, haven't that code pop up.

Mikegconigs

Yes Zakmartin i always use premium gas 93. I had just put 20 in and the weather here right now is close to freezing I dont know if the cold gasoline could have done anything but the car runs fine right now and the only thing i felt was a sputter for a second and then it just kept driving. I may just replace the camshaft and clear the code and see if that helps. Thanks JMII and zachmartin

Mikegconigs

Now that i lookes my camshaft sensor is really dirty around the codes and where its. Plugged in

Mikegconigs

Also the pop noise is mechanical i took it to the shop and i need new lower control arms

Mikegconigs

I did have two differnt occasions and the car stalled on me. One time i was driving and the other way on start up. Im saying this becuase I think this would lead me to believe that it is the camshaft that is going bad. Also the guy at autozone said one of the other (knock sensor or camshaft sensor) could be the probelm ans just be throwing the other code on. Im just gunna replace that camshaft myself later this week. Thank you both