What Does P0776 Mean?
The TCM has detected that Pressure Control Solenoid B is not performing within expected parameters or is stuck in the off position. This solenoid regulates hydraulic pressure within the transmission to achieve smooth, properly timed shifts. When stuck off, the solenoid cannot build adequate pressure, causing the transmission to slip, shift harshly, or fail to engage certain gears entirely.
Common Causes
35%
Faulty pressure control solenoid B (mechanical sticking or worn plunger)
25%
Dirty or degraded transmission fluid causing solenoid valve to stick
20%
Valve body wear or debris restricting hydraulic flow to solenoid
12%
Internal transmission component wear causing pressure bleed-off
8%
TCM calibration or adaptive pressure learning issue
Diagnostic Steps
1
Inspect transmission fluid level and quality — dark, burnt fluid with metallic particles strongly suggests internal wear and solenoid contamination.
2
Monitor PCS B commanded duty cycle vs actual line pressure in live data to determine if the solenoid is responding to TCM commands.
3
Perform a hydraulic line pressure test to verify that pressure is within specification across all gear ranges.
4
Drop the transmission pan and inspect for excessive metallic debris, then remove and inspect the valve body for worn bores and clogged passages.
5
Bench-test pressure control solenoid B for proper operation, verifying correct flow rate at specified duty cycles.
6
After repair, flush the transmission fluid, replace the filter, and perform a TCM adaptive value reset with a complete relearn procedure.
Estimated Repair Cost
$250 - $1,600
Parts + labor, varies by vehicle and location
The TCM has detected that Pressure Control Solenoid B is not performing within expected parameters or is stuck in the off position. This solenoid regulates hydraulic pressure within the transmission to achieve smooth, properly timed shifts. When stuck off, the solenoid cannot build adequate pressure...
The most common cause of P0776 (Pressure Control Solenoid B Performance or Stuck Off) is: Faulty pressure control solenoid B (mechanical sticking or worn plunger)
Typical repair costs for P0776 range from $250 to $1,600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
The vehicle may exhibit transmission slipping, flare shifts, or delayed gear engagement. Limp mode is possible. The vehicle is generally still drivable at reduced performance, but avoid heavy loads and extended highway driving until repaired.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to P0776 to identify the root cause.
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Quick Info
Category
Powertrain
System
Automatic Transmission
Difficulty
Type
Generic (SAE)
Recommended Tools
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