Code p0783 getting p0783 code and p0300 code what are they and causes

Code P0300 is not a timing code at all , it is a "Random Engine Misfire" code. Timing is computer controlled and no adjustment is required or provided for by the way. Follow the link for more info on the fault code P0300
https://www.obd-codes.com/p0300

Not much.
Code 300 is for a random miss. The engine computer has detected more than one cylinder that is not producing power, but no one cylinder is constant.
Until you get a code like 301 or 303 its a guessing game. 301-306 would tell you which cylinder is being the problem.
The cause could be fuel or spark.

Codes p0300 random misfire, p0302-0304 misfire cylinder 2-4. P0133 o2 circuit slow response bank 1 sensor 1. P1176, P1300, P1580, P1543, B0423 r make specific which you didn't say this would cause the problems you are having.

HARD TO SAY WITH OUT BEING THERE BUT THIS MIGHT HELP .
Crankshaft sensor Was the trouble with my 99 Chevy truck after replacing many components like coil cap rotor wires and so on .
http://www.obd-codes.com/p0102 Code P0300 Causes and Fixes Code p0300 is a code that is generated when your engine has a misfire that is not related to only one cylinder. Sometimes this code will be set in addition to other codes such as p0301 which means that there is a misfire on cylinder 1 (cylinder 1 is the number one cylinder when looking at the firing order. It is generally the forward most cylinder on the engine.). If these engine codes are present as well the you should diagnose those first as they are probably causing code p0300.
This code will set your check engine light and needs to be fixed as soon as possible. If it is not then you will probably need to replace your catalytic converter as well as the problem that is causing your misfire.
There are many causes for this obd code. Since it is a "random misfire" or "multiple misfire" this means that the misfire is on different cylinders and not just one all the time.
Common Causes

• Low Fuel Pressure
• Vacuum Leak
• EGR system malfunction
• Internal Engine Problems (such as low compression)

Less Common Causes

• Faulty Coil
• Faulty Spark Plugs and/or Wires
• Camshaft or Crankshaft sensors
• Ignition module
• Computer

get trouble code manual

p0783 is a generic code for 3-4 shift, it will be set off any time the actual gear is not consistant with gear shift position can be caused by faulty solenoid, loose/shorted solenoid connector, even low trans fluid

P0783 DODGE - 3-4 Shift Malfunction
Possible causes- Low transmission fluid level
- Dirty transmission fluid
- Faulty shifting solenoid valve
- Shifting solenoid valve harness or connectors
- Shifting solenoid valve circuit is open or shorted

Code P0131 is your Oxygen sensor that needs to be replaced. This could cause the other code which is P0300-Random Multiple Misfire although this is usually caused by one of two other sensors. Try replacing the Oxygen sensor first and reset the computer and see if you still get the P0300 code afterward. If you do then you will have to have the Crank Position sensor and the Cam Position sensor tested. Now, being a 1995 the P0300 code could be caused by the timing belt if it is worn and about to go out but you need to address the O2 Sensor issue first then see if the other code comes up again as it is common in that year for the O2 Sensor to fault and have a second or third code thrown at the same time that is essentially a ghost code as nothing is wrong in that area.

P0107 OBD II Trouble Code Manifold Air Pressure MAP Barometric Pressure...

Code P0300 What Causes It and How to Fix It

random misfires can be attributed to lean fuel mixture caused by vacuum laeks, egr stuck open. check the link.

http://www.random-misfire.com/