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2015 VOLVO XC60
2.0L Turbo Supercharged I4•AWD•AUTOMATIC•gas•B4204T6•turbo
1 active safety recall on this vehicle — view recalls
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Repairs0Labor485Torque1490Fluid10DTC1826Battery1Maintenance0Recalls1
P0777moderate severityPowertrain

Pressure Control Solenoid B Stuck On

on 2015 Volvo XC60 2.0L Turbo Supercharged I4 · AWD

What this code means

The transmission pressure control solenoid B is stuck in the on position. This leads to excessive line pressure and shifting problems.

Symptoms

  • Harsh shifts
  • Transmission overheating
  • Delayed engagement

Common causes

  • Stuck pressure control solenoid B
  • Contaminated transmission fluid
  • Faulty valve body
  • Wiring or connector fault

Diagnostic steps

  1. Check fluid level and condition
  2. Scan for stored codes
  3. Test solenoid B for stuck operation
  4. Inspect valve body and replace solenoid if faulty
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