My engine light is on and When I checked it it says that the code is "P 0123". How do I check to see what it is and if someone can tell me what it is, I would appreciate it. I have a 2003 Rubicon.

 

P0123(M) Throttle Position Sensor Voltage Throttle position sensor input above the maximum High acceptable voltage.

So it's probably a TPS issue. Happy reading:

http://www.jeepforum.com/forum/searc...archid=7642449

 

Thanks for the info. I'll look into it.

 

Here's the descriptions (there are two listed) for the Code P0123 ...

Throttle Position Sensor Voltage High (meaning the throttle position sensor input is above the maximum acceptable voltage)...or..

Accelerator Position Sensor (APPS) Signal Voltage Too High (meaning APPS voltage input above the maximum acceptable voltage)

Hope this helps...

 

Thanks all for the help. I installed a new TPS switch and everything is working great. Thanks again.

 

Gotta it love when its that simple.

 

Quick internet search yields hundreds of results,

here is a nice list,
http://www.getahelmet.com/jeeps/tech/codes/

good luck...

Billy