OBD Guide
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P1701

Transmission Control Module Power Supply

P1701 is an OBD-II diagnostic trouble code meaning: Transmission Control Module Power Supply. Common causes: blown tcm power circuit fuse, wiring harness damage. Estimated repair cost: $1–33.

Severity
🔴 High
Can you drive?
Do not drive — repair immediately
Approx. repair cost
$1–33 (est.)

Symptoms

  • The car goes into emergency gearbox mode
  • Inability to change gears
  • Check Engine Light Is On
  • Loss of engine power
  • Unstable automatic transmission operation

Causes

  • Blown TCM power circuit fuse
  • Wiring harness damage
  • Oxidation of module connector contacts
  • Power relay fault
  • Control module ground problems

How to Fix

  1. Check and replace TCM power circuit fuses
  2. Inspect and repair damaged wiring
  3. Clean the control module connector contacts
  4. Check the operation of the power relay
  5. Check the quality of the ground connection

Related codes

P1700P1702P1703

Error P1701 by Vehicle Brand

BuickCadillacChevroletFordGMGMCLincolnMazdaMercuryNissanOldsmobileSaturnSubaru

FAQ

What does the P1701 code mean?

P1701 is an OBD-II diagnostic trouble code that indicates: Transmission Control Module Power Supply

What causes a P1701 error code?

The most common causes of P1701 include: Blown TCM power circuit fuse; Wiring harness damage; Oxidation of module connector contacts; Power relay fault.

How do I fix a P1701 diagnostic trouble code?

To fix P1701: Check and replace TCM power circuit fuses. Inspect and repair damaged wiring. Clean the control module connector contacts. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1701?

Do not drive — repair immediately

How much does it cost to fix P1701?

The estimated repair cost for P1701 is $1–33. Actual cost depends on your vehicle, location, and labor rates.

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