OBD Codes List

Diagnostic reference · P2874

P2874

Clutch B Pressure Disengagement Too High

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

What it means

P2874 means Clutch B Pressure Disengagement Too High.

Check these first

  • Clutch B holding pressure that will not release fast enough
  • A stuck clutch B solenoid or valve
  • Contaminated fluid blocking the clutch B exhaust port
  • A worn clutch B pack dragging on disengagement
  • A transmission control module applying clutch B pressure late

What to do next

  1. Check transmission fluid level and condition
  2. Read clutch B pressure on a scan tool and compare to commanded
  3. Test the clutch B solenoid and valve for sticking
  4. Command clutch B off and watch pressure fall
  5. Repair the sticking valve or replace the clutch B pack
  6. Clear the code and retest

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Updated

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