Hi everyone, I'm new to the forum. I just purchased a 2003 350z 6 speed. I purchased this car with the current problem and have searched the threads but I still have not come up with a solution.. VDC OFF and SLIP lights are on and it will not rev past 2k rpm. I ran the codes and get P2135, P0550, P0222, and P0123. I have done the ecu reset and relearning procedures but the cel light stays off for a couple of seconds then comes back on. The vdc and slip light never go off and they come on immediately when I start the car. I have also tried unplugging the battery for 24hrs and still no luck. I figured that it might be either the throttle body or the position sensor on the pedal, Any ideas how to narrow my choices? Any help would be appreciated. Thanks in advance.

 

so you bought the car with these issues? how much did you pay for it? you should do all the relearns.

http://www.technosquareinc.com/350reset.htm

p2135 = throttle position sensor
p0550 = power steering pressure sensor
p0222 = Throttle Position Sensor
p0123 = TP Sensor

 

I got it for less than $5000. I did all the relearn procedures a bunch of times but still the same problem. I will say that when I got the car the throttle body was making a loud whining noise and after the resets it went away but the other problems were still there.

 

try replacing the throttle body, i have a feeling you might spend some coin to fix the car

 

Any way to know for certain if its the throttle body or the position sensor on the pedal? Or is it hit or miss?

 

well you have 2 codes on it and you said it was making a noise..... good place to start

 

Good Point

 

my friend used to have one.. let me see if he still does

 

ok thanks