Keeps showing code camshaft sensor,, clear ,, give

Question edited for clarity.
Question moved to model category.

Yyou can't diagnose issues like this yourself. You need more that a $125 scan tool. You need an auto electrician with a $5,000 bi-directional scan tool computer and the experience to use it. This is all electronics and computer networks and can't be guessed.

P2127 Dodge The P2127 code means that the throttle or pedal position sensor switch E has a low input. The pedal position sensor is a sensor found on the gas pedal. The sensor tells the ECU when the gas pedal is depressed and how far it is depressed.

P2127 OBD-II Trouble Code: Throttle/Pedal Position Sensor ...

That is a separate fault. P0345 is definitely the Camshaft Position Sensor and should not be related to the transmission. Did you clear the code with a Code Scan Tool?

https://www.google.com/search?q=nissan+altima+p0345

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check and test the crankshaft position sensor and also the camshaft position sensor. Have a local autoparts store scan the dtc or diagnostic troubleshooting codes. this will you give yo a better idea of whats causing the issue. Also clear all dtc's and drive vehicle until check engine light comes back on. recheck codes. but i will almost bet the bank its going to be one of those sensors. also oil leaks will do a number on the wiring connectors. possibly a simple cleaning of the wiring connectors will solve the issue too

clearing the code is done by using a scan tool to reset the ECM
As it still dies and the light is still on then I suspect that you changed the wrong sensor
possible that it should have been the crankshaft sensor and not the cam shaft sensor
the error code will not effect the engine/ transmission performance
it is just a report to show you where the problem is

EOBD II Error Code: P0117
Fault Location:
Engine Coolant Temperature (ECT) Sensor (G62) - Low Input
Possible Cause:
Malfunction Indicator Lamp (MIL) Triggered on first occurrence.
Coolant thermostat.
Wiring short to earth.
Engine coolant temperature (ECT) sensor.

EOBD II Error Code: P0340
Fault Location:
Camshaft Position (CMP) Sensor A (G40), Bank 1 - Circuit Malfunction
Possible Cause:
Malfunction Indicator Lamp (MIL) active.
Wiring from/to Camshaft Position Sensor (CMP) faulty.
Camshaft position (CMP) sensor faulty.
Timing misaligned.
Possible Solutions:
Check Wiring from/to Camshaft Position Sensor.
Check Camshaft Position Sensor.
Check Timing.

EOBD II Error Code: P0500
Fault Location:
Vehicle Speed Sensor (VSS) - Circuit Malfunction
Possible Cause:
Malfunction Indicator Lamp (MIL) Non Emission Fault - No warning light.
Wiring.
Vehicle speed sensor (VSS).
Engine control module (ECM).

Codes don't give a fix, they give an area to diagnose to find out what is the problem that causes the code to set. Here are the possibilities for your Dodge.
P0123 DODGE - Throttle Position Sensor/Accelerator Position Pedal Circuit High Input.
Possible causes- Throttle position sensor harness is open or shorted
- Throttle position sensor circuit poor electrical connection
- Faulty throttle position sensor
- Faulty Powertrian Control Module (PCM)

I have problems with power reduction and review it with the computer but sheds no fault code, and I made several changes but it is not

P0010....'A' Camshaft Position Actuator Circuit (Bank 1)

P0011....'A' Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)

P0012....'A' Camshaft Position - Timing Over-Retarded (Bank 1)

P0013....'B' Camshaft Position - Actuator Circuit (Bank 1)

P0014....'B' Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)

P0015....'B' Camshaft Position -Timing Over-Retarded (Bank 1)

P0020....'A' Camshaft Position Actuator Circuit (Bank 2)

P0021....'A' Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)

P0022....'A' Camshaft Position - Timing Over-Retarded (Bank 2)

P0023....'B' Camshaft Position - Actuator Circuit (Bank 2)

P0024....'B' Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)

P0025....'B' Camshaft Position - Timing Over-Retarded (Bank 2)

I think your sensors are pattern parts and the readings /resistances are not the same as the original parts ,try some bosch units is my first suggestion ,

16396/P0012/000018 - Bank 1: Camshaft A (Intake): Advance Setpoint not Reached (Over-Retarded)

Possible Symptoms:
Erratic Idle

Possible Causes:
Intake Camshaft Adjuster tight/stuck
Intake Camshaft Adjuster faulty

Possible Solutions:
Check Intake Camshaft Adjuster
Use Output Test, Meas. Value Blocks (MVB) & Basic Setting

If the car runs fine, clear the code and see if it decides to come back.

replace the camshaft position sensor. it is located near the camshaft or top timing gear. Either on the outside of the cover or in , it depends on your car. Go to autozone .com . They may be able to give the location of the sensor.