Dreaded p0123 - TPS replaced... sputtering badly!

Okay, we're talking about a 99 Jeep Wrangler Sport. Recently had to replace the manifold but before that, the CE light and the AIRBAG light came on and I started sputtering. Horn and everything else works... I've been following some threads and some have indicated a faulty clock spring could be the culprit. The TPS has been replaced and I even had a different throttle body on it.. still, I get the CE light, the p0123 code, and a nasty bit of hesitation with some sputter. I checked the wires (be it not very closely) and they look good. I'll take another look. Any suggestions?

Look along the wiring harness for the TPS and see if there are any obvious signs of rubbing, etc. IF not then you'll have to scope the signal wire from the tps. Evidently there's an open in the signal wire or a short to voltage or even the ground wire may be open.

I'd suggest getting the tps signal scoped assuming the circuit to it is fine!
Yes it could also be the clockspring, to confirm thata shortted clockspring is the culprit you have to unplug it and recheck the tps! pretty common for the tps to fail like that! Occasionally the clocksprings as well. Please tell me you used the tps from the dealer?

I'm really confused on this one, please explain if you can, how it could be related to the clock spring. I can't see how the TPS would in any way be related to the clock spring. It just doesn't make sense to me. So anyone that can tell me how that would be possible, I want to know. I've heard the clock spring mentioned a few different times, but no one has said how they could be related.

Thanks Shawn

Hey, so you're on this forum too, eh? It's so hard trying to figure this out.

The clockspring wouldn't have anything to do with the TPS, rather the airbag light that the original poster mentioned in his first post. 2 different problems that are unrelated. The P0XXX code referrring to the tps and the airbag light indicates the airbag module has a hard fault in the system somewhere.
Hope this clears it up.

Actually it can and if you check on IATN there's several mentions of tps faults on chryslers caused by clocksprings. It has to do with how the 5 volt reference is wired in the vehicle. Im not going to argue with anyone over it because if I hadn't seen it enough times with my own eyes I wouldn't have believed it either. I gave him a cheap almost fool proof way to determine if it is! If he doesn't want to take my advice then I'm not going to loose any sleep over it. Change the pcm and harness and map sensor then and if that doesn't do it try the clockspring. Makes no difference to me! He needs the airbag code scanned no question about it but if it were my own vehicle or my customers and the clockspring was the source of the airbag code I'd change it before spending a ton of time on the tps fault because it may very well kill the 2 birds with one stone!

I'm willing to try everything and I too have seen too many posts about faulty clocksprings associated with tps codes etc, especially when the airbag light comes on. The light has since gone off. In fact, the check engine light went off as well so I don't know what's going on. It drove great this morning but I'm sure it's only a matter of time before it comes on again.

Now that you mention it Comp, I think you may be right. Doesn't it have to do with the speed control? Anyway, still, he needs to start his diagnosis from the TPS and then move to airbag, like you said.

Yeah in a nutshell that's it! You gotta really look the wiring diagrams over as well to see it because it's not obvious, doesn't make sense and a pretty weird place to look for a tps problem but it is there. I've seen it now on a 99 Caravan, an 02 Cherokee and alot of Dakota's. As you've probably seen Clocksprings tend to come and go for codes as the steering wheel works back and forth. I'd love to actaully get a scope on one as it's acting up and try to disrupt the tps signal by sawing the wheel back and forth. I've also seen shortted speed sensor on Lh bodys cause issues with evap emission systems and A/C pressure transducers that cause no starts so it is a fine product to try and get your head around!

I can verify that the clockspring is the culprit for the TPS code. At least in my case. I just took in a 98 jeep wrangler that missed,died,hesitated etc all the time. Not intermittent at all. The airbag light was also on. I pulled the codes and did a search and found this thread on the subject. I then pulled the steering column covers and disconnected the clockspring. The jeep runs perfect now by only disconnecting the clockspring.

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