Kia P1723: TCM A/T Control Relay Line Circuit Malfunction

Is your scanner showing Kia P1723?
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Kia P1723: TCM A/T Control Relay Line Circuit Malfunction

DIY Difficulty Level
Repair Cost
Can I Still Drive?
Yes (Short-term only)

What Does The Kia P1723 Code Mean?

Key on or engine running and the PCM detected the A/T control relay voltage as less than 7 volts. The PCM locks the gear selection into 3rd gear for safety when this trouble code sets.

What Are The Potential Causes Of The Kia P1723 Code?

  • O/D “Off” lamp circuit is open between PCM and the TCM
  • O/D “Off” lamp circuit is shorted to ground between the TCM and the PCM
  • O/D “Off” lam circuit is shorted to system power between the TCM and the PCM

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> Twippo 372Pcs Waterproof Wire Connectors Kit

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Reference Sources


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