I have a 2005 dodge neon, throwing codes p0129, u110c, p0508.. what needs to be changed?

Question edited for clarity.
Question moved to model category.

These are your codes. Your 'new' alternator is still faulty. You need an auto electrician..

https://www.google.com/search?q=auto+electrician+near+me

P0129 Barometric Pressure Too Low

OBD-Codes.com https://www.obd-codes.com > p0129
When you find a P0129 code stored in your OBD-II equipped vehicle, it means that the powertrain control module (PCM) has detected a low barometric pressure ...

P0508 Idle Air Control Circuit Low

OBD-Codes.com https://www.obd-codes.com > p0508
When your OBD-II equipped vehicle exhibits a malfunction indicator lamp (MIL) and a stored code P0508, it means that the powertrain control module (PCM) has ...

Dodge Stratus P0622: Meaning, Causes + Diagnosis - 700R4

700r4transmissionhq.com https://www.700r4transmissionhq.com > p0622-dodge...
Sep 22, 2021 - This code indicates the generator field coil control circuit is malfunctioning. It can be a challenge to diagnose. P0622 Meaning: Generator ...

P0688 ECM/PCM Power Relay Sense Circuit Open

OBD-Codes.com https://www.obd-codes.com > p0688
When a code P0688 is stored, it means that the powertrain control module (PCM), has detected an abnormality in the relay which supplies it with voltage.

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This could be a wire issue. You need to check all the connections and grounds.

P0315 - Crankshaft Position System Variation Not Learned
P0335 - Magnetic Crankshaft Position Sensor Electrical Error China OBD2 car diagnostic tools wholesale on CareUCar

• egr valve
• egr sensor
• cam shaft sensor
• barometric pressure sensor (map sensor)

vacuum leak somewhere, out of time, broken timing belt or missing teeth.

I have the exact same 5 codes, as written in the question. Vehicle is experience a host of intermittent electrical issues, with almost all electrical components sometimes working and sometimes not.

Check with service dept of your local dealer if code is customer serviceable

you are incorrect on your code read. u0155 is lost comm with IPC, u110c is no fuel read, u0140 lost comm with BCM and can all be fixed with a new BCM.

P0129 Barometric Pressure To Low

I had a similar problem all it was a the rubber boot after the sensor was sightly disconnected and produced the same code. I would even take it as far if there is a decent rip in the boot would also cause the problem.

and yes you can test it