OBD-II code · Powertrain (generic)
P0779 Pressure Control Solenoid B Intermittent
Pressure control solenoid B shows intermittent electrical or hydraulic dropouts — vibration, loose connector, or contaminated ATF that occasionally restricts the regulator port.
Is it safe to drive with P0779?
Usually safe to drive in the short term. Get it diagnosed when convenient, sooner if the car drives differently.
Common causes
- Most likelyLoose connector at the transmission
- Less likelyConnector with intermittent contact under vibration
- Less likelyHarness routed against vibrating component
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
Repair at a glance
- Difficulty
- Medium
- DIY friendly
- Best left to a mechanic
- Typical labour
- 1–5 h
- Emissions test
- Usually unaffected
- Parts involved
- Pressure Control Solenoid B, Tcm
Related codes
- P0749Pressure Control Solenoid A Intermittent
- P0777Pressure Control Solenoid B Stuck On
- P0799Pressure Control Solenoid C Intermittent
- P08BEPressure Control Solenoid L Intermittent
- P08C7Pressure Control Solenoid M Intermittent
- P2717Pressure Control Solenoid D Intermittent
- P2726Pressure Control Solenoid E Intermittent
- P2735Pressure Control Solenoid F Intermittent
- P27BCPressure Control Solenoid N Intermittent
- P27C4Pressure Control Solenoid P Intermittent
- P27CCPressure Control Solenoid R Intermittent
- P27D4Pressure Control Solenoid S Intermittent
- P0776Pressure Control Solenoid B Performance
- P0778Pressure Control Solenoid B Electrical
- P077AOutput Shaft Speed Sensor Circuit - Loss of Direction Signal
- P077BOutput Shaft Speed Sensor Circuit - Direction Error
- P077COutput Shaft Speed Sensor Circuit Low
Code data: OBDex open dataset (CC0). Labour times are typical ranges, not a quote.