Re: 2003 Ford Explorer XLT: code p0775: solenoid b malfunction.
To fix the solenoid you have to replace it. I believe they come in what's known as a 'block' only. I believe it will run close to $300, but it depends on the dealership. I'm not sure if you can buy them anywhere else. If you can lift up the vehicle you can change it yourself in 2-3hours. Be careful if you do, and refill with fresh fluid. Don't just fill up the pan while the car isn't running. You have to have the car running, in park, and have the fluid come back out the fill hole before you have enough in. Then take it for a drive and make sure you go through the gears, park the vehicle in neutral with the parking brake engaged and check the fluid again to make sure it's within proper operating parameters.
'11 Ram Quad Cab 4x4 SXT 5.7L HEMI (stock); 48,500m
'06 Pontiac G6 GT 3.5L 220hp; 64,000m
'12 Chrysler 200 Limited 3.6L 283hp; 28,000m
'99 Taurus 3.0L 2V Vulcan 145hp; 154,300m - Traded
Amsoil in all vehicles!