P0778 Diagnostic Trouble Code Discussion for October 2026
Shift Pressure Solenoid Circuit Malfunction
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| Help Request | Posted | |
| 2004 Toyota Sienna XLE 3.3L Poor Idle Quality, Cuts out, Misfire VIN: 5TDZA22C34 P0778: Pressure Control Solenoid 'B' Circuit Malfunction. ... with supposed good recycler good units. Timing belt, water pump, thermostat, spark plugs replaced at time of replacement. Has only been running on 4 cylinders since repair. Cylinders 1 and 2 seem to be the down cylinders despite them having 120 psi lik... |
October 12, 2026 | |
| 2004 Toyota Sienna XLE 3.3L Poor Idle Quality, Cuts out, Misfire VIN: 5TDZA22C34 P0778: Pressure Control Solenoid 'B' Circuit Malfunction. ... with supposed good recycler good units. Timing belt, water pump, thermostat, spark plugs replaced at time of replacement. Has only been running on 4 cylinders since repair. Cylinders 1 and 2 seem to be the down cylinders despite them having 120 psi lik... |
October 17, 2026 |
