Subaru P1742: Automatic Transmission Diagnosis Input Signal Circuit Malfunction

Is your scanner showing Subaru P1742?
No worries. We'll show you what it means and how to deal with it.

Presented by
Randy Worner

Subaru P1742: Automatic Transmission Diagnosis Input Signal Circuit Malfunction

OVERVIEW
Severity
:
Medium
DIY Difficulty Level
:
Intermediate
Repair Cost
:
$75-$200
Can I Still Drive?
:
Yes (Short-term only)

What Does The Subaru P1742 Code Mean?

Vehicle performance issue.

What Are The Potential Causes Of The Subaru P1742 Code?

  • Check for identification circuit malfunction
  • Check driving conditions (shift control pattern)
  • Check output signal for ECM
  • Check accessories (car phone, CB installation, etc)

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
>>> Automatic Transmission Control Module

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

Reference Sources

Subaru Impreza Repair Manual for P1742 – Pages 671-674.

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