OBD Codes

P0973

Shift Solenoid "A" Control Circuit Low

Moderatetransmission

Overview

The P0973 diagnostic trouble code signals a shift solenoid "a" control circuit low condition detected by the transmission control module. This code relates to the automatic transmission system and may affect shift quality, timing, or overall transmission performance. Prompt attention is important to prevent further transmission damage.

Symptoms

  • Transmission overheating warning
  • Vehicle stuck in one gear (limp mode)
  • Loss of one or more gears
  • Check Engine Light (MIL) illuminated

Common Causes

  • Failed torque converter
  • Worn transmission bands or clutch plates
  • Low or contaminated transmission fluid
  • Wiring issues in the transmission harness

Diagnosis Steps

  1. 1Connect an OBD-II scanner and read all stored trouble codes and freeze frame data
  2. 2Check transmission fluid level and condition; top off or replace if needed
  3. 3Test the transmission speed sensors with a multimeter or scan tool
  4. 4Inspect wiring and connectors for the transmission harness
  5. 5Perform a transmission pressure test if accessible

Estimated Repair Cost

$300$2,500

Cost varies by vehicle, location, and repair shop. Includes parts and labor.

Commonly Affected Vehicles

Ford F-150Toyota CamryNissan RogueHyundai Santa Fe

Related Codes

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Frequently Asked Questions

Driving with a transmission code is risky. Continued driving can cause further damage to the transmission, resulting in significantly higher repair costs. Have it inspected as soon as possible.