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View Full Version : If you ever get a P0123 code CHECK this first (TPS high voltage)



D.K.
15-05-10, 09:53 PM
Just thought id pass this on as it could save you a LOT of time and $$.

My 1999 TJ was hesitating on throttle input and the engine checklight was giving a P0123 code: throttle position sensor high voltage.

I was informed that in the event of a computer (PCM) malfunction a replacement was going to be expensive and the SKIM unit would also need to be reflashed to read the new computer. (Apparently Steve T didnt need to do this on his TJ, but on my 1999 TJ onwards you do)

Luckily I came across a few threads on www.jeepforum.com (http://www.jeepforum.com/) about how the clockspring (located under the steering wheel cover) has an electrical connection to the PCM and if this malfunctions it will throw a P0123 code.
The cure is to pull out the electrical connection. Sounds unlikely but true.

Thanks to Jason at Total Care 4WD he took the information seriously and hey presto - no engine check light, car runs smoothly.

Do a search for "clock spring" on www.jeepforum.com (http://www.jeepforum.com/) for further details