Error code

OBD2 P0747

OBD2P0747
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Pressure Control Solenoid 'A' Stuck On.

Severity

moderateCan drive, but performance issues may occur and worsen over time.

Summary

P0747 indicates that the pressure control solenoid 'A' in your transmission is stuck in the open position, affecting fluid pressure and potentially causing issues with gear changes or torque converter lockup.

Symptoms

  • Check Engine light illuminated
  • Harsh gear engagement
  • Slipping transmission
  • Transmission flares while driving
  • Burnt transmission fluid
  • Limp mode
  • Transmission won't engage drive

Common Causes

  • Lack of proper maintenance (e.g., insufficient transmission fluid)
  • Internal transmission control module short circuit
  • Failure of pressure control solenoid A
  • Dirt or obstruction in the pressure control solenoid passage

Diagnosis

  1. Check for consistent clicking sound when energizing the solenoid with a battery lead.
  2. Inspect wiring circuit for shorts to voltage.
  3. Test control module for faults if power is present where it shouldn't be.
  4. Remove and inspect solenoid for physical obstructions.

Fixes

  • Replace the faulty pressure control solenoid A.

FAQ

How do I know if my transmission fluid needs maintenance?

Check your vehicle's manual for recommended intervals. Look for dark, burnt-smelling fluid or metal shavings in the pan.

What happens if I ignore this code?

Ignoring P0747 can lead to further transmission damage and reduced performance over time.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

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