OBD Codes List

Diagnostic reference · P093D

P093D

Hydraulic Accumulator Solenoid Performance

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

What it means

P093D means Hydraulic Accumulator Solenoid Performance.

Where it lives

For P093D, start at the solenoid the description names.

Check these first

  • A hydraulic accumulator solenoid that does not hold pressure
  • Debris in the accumulator solenoid valve
  • A weak accumulator spring or charge
  • A TCM driver fault on the accumulator solenoid circuit

What to do next

  1. Read hydraulic accumulator solenoid command on a scan tool
  2. Watch accumulator pressure with the solenoid commanded
  3. Check the fluid level and condition
  4. Measure the accumulator solenoid resistance
  5. Replace the solenoid if the pressure bleeds off
  6. Clear the code and retest

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Updated

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