error 0303 on windows 8.1 .can't startup .use a startup disk USB and reboot yur computer from windows vista or 7 and the problem is fixed by vista auto diagnostic no need to change the hard drive.try to reboot your system from its original operating system that can understand its own hardware
Trouble code P0303 means:Cylinder 3 misfire detected
P0303, cylinder #3 misfire. Check plug, wire, coil, etc.
Try replacing the plugs and wires
A P0303 error code is caused by misfire on piston 3. This can come as a result of a bad spark plug, damaged wires, or even a problem with the vehicle's computer.
Try to update your browser. Possibly the latest version of internet explorer?
Try replacing the plugs and wires
Probably the vent control solenoid by the fuel tank.
You are probably seeing this in internet explorer or another web browser. This error has nothing to do with your computer. It is just the server the website you are trying to load. You should contact the site administrator to fix this
To fix error code 1460 in Internet Explorer or IE, the computer may have to be reset to an earlier time. This error code is usually because a file is corrupted, not complete, or there is a virus on the computer. A system restore should take care of the problem.
Use Mozilla Firefox.
Look for a vacuum leak...
This means that your vehicle is missing on cylinder 3. You will need to have your coil changed to fix this problem