OBD-II reference

All 9.533 generic OBD-II codes, explained in detail.

Causes, inspection steps and sources — a comprehensive DIY archive. Created and maintained with love for the detail. Good luck and have fun!

Powertrain generic / SAE

P08BB

Pressure Control Solenoid L Performance/Stuck Off

Pressure control solenoid L is commanded on but does not produce the expected pressure. Spool stuck closed or hydraulic feed restricted.

SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number8 / BB

Possible causes

  • Solenoid spool stuck in closed position high
  • Hydraulic feed restricted by debris medium
  • Carbon or debris buildup preventing free movement low

Symptoms

  • Check engine or transmission warning light on
  • Harsh, delayed, or missing shifts
  • Possible limp mode (locked in one gear)
  • Slipping or shuddering during gear changes

Inspection / repair

  • Difficulty: hard
  • DIY: shop recommended
  • Estimated cost: 300–2500 €
  • Estimated time: 2–8 h
  • Component: pressure control solenoid l
  • Component: valve body
  • MIL / check engine light
  • limp mode possible

Sources

References

How to read OBD-II codes

The first letter names the vehicle system, the second digit distinguishes generic from manufacturer-specific, the remaining digits group fault area and number.

PPowertrain: engine, transmission, emissions
BBody: chassis trim, comfort, interior
CChassis: suspension, brakes, steering
UNetwork: CAN, control modules, communication