OBD Codes List

Diagnostic reference · P0749

P0749

Pressure Control Solenoid A Intermittent

System
Transmission (P code)
Lamp
Check Engine Light
Category
Powertrain - Transmission

What it means

P0749 means Pressure Control Solenoid A Intermittent.

Where it lives

For P0749, the description names the solenoid as the part involved.

Check these first

  • A pressure control solenoid A with an intermittent internal fault
  • A chafed solenoid wire that shorts only under vibration
  • Corrosion in the solenoid A connector
  • Dirty transmission fluid clogging the solenoid valve
  • A failing TCM driver for solenoid A

What to do next

  1. Read pressure control solenoid A live data while the fault is active
  2. Wiggle the solenoid A harness to provoke the intermittent fault
  3. Inspect the solenoid A connector for corrosion
  4. Check transmission fluid level and condition
  5. Replace pressure control solenoid A if the fault is internal
  6. Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.