Powertrain, generic · Transmission

P08BB Pressure Control Solenoid L Performance/Stuck Off

Check engine lightOn
EmissionsRelevant
Drive cycleRequired
Limp modePossible

Set when pressure control solenoid L is commanded but the pressure or shift element it serves does not respond, i.e. the valve acts as if it were stuck in its off state. No manufacturer documents this code publicly. Toyota, the only known user of letter L, reports a stuck valve as P08BA with suffix 71 instead. The closest documented analogue is GM's P08C4 for solenoid M on the Corvette dual clutch, where an intrusive routine moves the shift rods slightly and flags the valve when the expected rod travel stays below 100 µm. CARB requires such functional checks for transmission solenoids. P08BC is the opposite fault, P08BF to P08C2 cover the circuit. The driver notices missing or harsh shifts.

Likely causes

Valve spool held closed by debris or varnish
Low fluid level or weak supply pressure to the valve
Leaking seal or circuit downstream of the valve

Symptoms

  • Check engine light on
  • Missing, slipping or delayed shifts
  • Possible substitute gear operation

Repair estimate

DifficultyShop_onlyWorkshop job
Parts and labour€200–4,000
Time1–6 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

pressure control solenoid lvalve body

Related codes

P08BAP08BCP08C4P0868P27B9

References: law.cornell.edu, gsi.ext.gm.com, static.nhtsa.gov.