OBD Codes

P0950

Auto Shift Manual (ASM) Control Circuit

Moderatetransmission

Overview

The P0950 diagnostic trouble code signals a auto shift manual (asm) control circuit 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

  • Check Engine Light (MIL) illuminated
  • Transmission slipping between gears
  • Harsh or delayed shifting
  • Transmission overheating warning

Common Causes

  • Faulty input or output speed sensor
  • Failed torque converter
  • Worn or damaged internal transmission components
  • Faulty transmission control module (TCM)

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

Honda AccordChevrolet SilveradoFord F-150Nissan Rogue

Related Codes

More Transmission Codes

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.