Powertrain, generic · Transmission

P0775 Pressure Control Solenoid B

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

Pressure control solenoids are current-controlled proportional valves, and what B and C mean depends on the design: on GM's clutch-to-clutch automatics they are the pressure valves of clutches 2 and 3, on GM's CVT B is primary pulley pressure and C line pressure, on Jatco CVTs B is the secondary pressure valve, on Saab's AF40 B and C are clutch valves SLC1/SLC2. P0775 is the general code for valve B. No manufacturer document available to us uses it; the trade journal MOTOR names it as a performance code of line pressure valve B on Ford's 5R55, set together with ratio codes after a broken overdrive servo. Sub-codes for performance, stuck on, electrical and intermittent follow (P0776–P0779).

Likely causes

Valve body or pressure valve B worn or dirty
Line pressure wrong (load signal, main regulator)
Fluid condition
Circuit or coil

Symptoms

  • Harsh or slipping shifts
  • Limp mode
  • Check engine light

Repair estimate

DifficultyHardWorkshop job
Parts and labour€200–3,000
Time1–10 h

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

Parts involved

pressure control solenoidtransmission valve bodytransmission clutchestransmission control module

Related codes

P0776P0777P0778P0779P0745P0965

References: motor.com, gsi.ext.gm.com, law.cornell.edu.