Po trouble codes

the following links can assist you
P0452 EVAP Pressure Sensor Switch Low
P0452 EVAP Pressure Sensor Switch Low P0452 OBD II Trouble Code P0452 Evaporative Emission Control System Pressure Sensor Low Input How to troubleshoot an EVAP Pressure Sensor problem P0452 GM

This diagnostic trouble code (DTC) is a generic powertrain code.... Basically this means that an oxygen sensor in bank 1 has detected a lean condition (too much oxygen in the exhaust).On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1

Here's a link to your code,Code p0306 is for the number 6 cylinder,other code is p0305. P0305 OBD II Trouble Code Cylinder 5 Misfire Detected YourMechanic Advice

P0115 Engine Coolant Temperature Circuit Malfunction

www.obd-codes.com/p0115
Detailed information on troubleshooting and repairing a p0115 automotive trouble codewhich refers to a malfunction in the engine coolant temperature circuit.

http://www.obd-codes.com/p0440

do the easiest cause first... did you recently get gasoline and didn't put the fuel cap back on correctly?

CLEAR the trouble code and re-seat the gas cap properly & then see if the check engine lights up with the same code... then go from there

i've embedded gbob59s link because it should have worked the first time

Discussion of that code:
P0442 OBD II Trouble Code

another source
P0442 OBD II Trouble Code

Trouble Code: P0128

Thermostat Rationality Test

Possible Causes:


Check the operation of the thermostat (it may be stuck open).ECT Sensor is contaminated, damaged or it has failed.Inspect for low coolant level or for an incorrect coolant mixture.Trouble Code: P0440

EVAP Purge System Fault

Possible Causes:


EVAP purge valve vacuum supply is leaking or clogged.EVAP purge valve is stuck closed.EVAP purge solenoid has failed.NVLD assembly (leak detection) is damaged or has failed.NVLD switch circuit is open or the NVLD switch has failed.Ground circuit is open.PCM has failed.Trouble Code: P0456

EVAP Small Leak (0.020") Detected

Possible Causes:


.EVAP fuel tank or canister vapor hoses leaking or damaged.EVAP system component leaking, fuel cap loose or missing.Leak detection pump damaged or leaking.Trouble Code: P0622

Generator Field Control Circuit Malfunction

Possible Causes:


Generator field control circuit is open or is shorted to ground.Generator field control circuit is shorted to system power (B+).Generator field ground circuit is open.Generator is damaged or PCM has failed.PCM has failed.Here are the codes and causes.

91 is OBDI not OBDII. The codes are just 12, 34, 45, and 48. 12 - diagnostic mode 34 - MAF/MAP sensor low voltage 45 - Oxygen sensor rich. 48 - not sure on that one What engine do you have? Are there any symptoms? Ill get you some more info once I know what engine.

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

this obd2 trouble code table can help you understand the meaning of code.
and for your code, I think you can try to change the whole sending unit with the fuel pump in the tank. And see if the code come back.

Trouble Code: P0455


EVAP Large Leak Detected

Possible Causes:


EVAP purge solenoid is damaged or it has failed

Fuel tank cap is damaged, missing or the wrong part number.(Check the fuel cap). replace if not the factory type.

NVLD switch is damaged or it has failed