P0123 TPS Code for 2000 Jeep Sport Cherokee with 4.0L engine

Question:

This 2000 Jeep Sport Cherokee has this check engine light coming on and when scanned, a code P0123-tps voltage abnormally high showed up. Ever since this happened, my cruise control quit working and the engine keeps stalling making it difficult to drive in heavy traffic. Measuring the tps voltage using ATS wiring diagram showed the tps is defective. We replaced the tps sensor but it did not fix anything. Thinking it might be the computer, we replaced that too and STILL the same code! Please help!

ATS Advisor:

This is a common problem and you should have contacted ATS before you replace those parts. The problem here is a faulty clock spring hooked up to your steering column. What is happening is the clock spring circuit is shorted and it is also connected to your tps circuit. To test, unplug the connection to the clockspring and your tps should work. Most of this problem is usually solved by replacing the clock spring. If the clock spring is fixed, it will fix the cruise control also.

ATS Tip:

A step by step procedure in replacing the clock spring is available from ATS if you are a member.