Serious Erratic Idle problem..HELP!

[WOs69coupe]

. All factory 94GT 5.0 HO. (5 spd of course)I have a problem with the idle. I ran it on a diagnostic and error codes (113, 157, and KEO11) basically told me:

--113 Intake Air Temperature Circuit High Input
--157 02 Sensor Circuit Low Voltage (Bank 2 Sensor 2)

I dont think the Intake air temperature circuit should cause this problem. Has anyone else had this problem or have suggestions

It idles so rough it makes the whole car shake...BAD! it still drives and has plenty of power, but at low rpm it is crap. It never dies, but just idles erratically. Any suggestions will be great.

i have plug wires, rotor, and dist. cap on order, even though they look fine

 

[GRGT1994]

Just a guess here, but your O2 sensor may have failed.

 

[HISSIN50]

Or the wiring for the O2 wiring is bad/resistive.

Put your meter on the signal wire and check for frequency and amplitude. It should go from about 0.05 to 0.90 volts more than once a second (as seen on your DMM).

Good luck.