what is code 123?

[luis_lapray]

hello, good morning.
this is my first post.
last night I took the codes of the suv(explorer 1993), and give me 2 codes.
the first is the number:
-539 (O) System shows voltage at PCM pin 10 Is A/C on ?
the second number is:
-123 (O,M) TP is/was high or short to power - TPS .
I'm worried with this number (123).
how can i check tps, I need to change this?.
-what do i need to make for solution this?.
-This is a big trouble?
-what is the meaning of the point O,M?
thanks.

 

[MrShorty]

O = KOEO code
M=CM code
See my "notes on pulling EEC-IV codes" thread for an explanation of what KOEO and CM mean

KOEO 539 almost always means that the KOEO test was performed with the AC on.
CM 123 would point to a possible (intermittent?) fault in the TPS circuit. With nothing else to go on, the first thing I'd probably do would be to clear CM, and drive it around and see if/when the code comes back.

 

[luis_lapray]

O = KOEO code
M=CM code
See my "notes on pulling EEC-IV codes" thread for an explanation of what KOEO and CM mean

KOEO 539 almost always means that the KOEO test was performed with the AC on.
CM 123 would point to a possible (intermittent?) fault in the TPS circuit. With nothing else to go on, the first thing I'd probably do would be to clear CM, and drive it around and see if/when the code comes back.

Thanks for you answer.
I had been reading in this forum, and this trouble can to be for bad ground connected.the light check engine isn't intermittent, sometimes the light is on, and sometimes the light is off.
in this morning, i have connected a wire of the car battery(-negative) to bolt next to the throttle body and today not has iluminated the check engine.
I going to wait for sometime (today and tomorrow) and see if this is the solution.