Changed all o2 sensors and crankcase breather pipe still got 1646 1647 codes

Here are the fault codes you provided for a 2015 International 4700 with a Cummins 6.7 engine:
1. Fault Code 4094: This fault code refers to "Selective Catalyst Reduction (SCR) Catalyst Conversion Efficiency - Data Valid but Below Normal Operating Range - Moderately Severe Level." It indicates an issue with the SCR system's efficiency. This could be caused by a malfunctioning SCR catalyst, a faulty sensor, or an exhaust leak. Professional diagnosis and repair are recommended to address this fault.
2. Fault Code 1569: This code indicates "Crankcase Breather Filter Restriction - Condition Exists." It means there is a restriction in the crankcase breather filter. Check the breather filter and replace it if necessary. Cleaning or replacing the crankcase breather assembly might also be required.
3. Fault Code 1552: This fault code refers to "Fuel Rail Pressure Too Low - Moderate Severity." It suggests that the fuel rail pressure is lower than the expected range. Potential causes could include a clogged fuel filter, a faulty fuel pump, a fuel pressure sensor issue, or a problem with the fuel injectors. A thorough inspection and diagnostic testing should be performed to identify the exact cause and resolve the issue.
4. Fault Code 597: This code indicates "Injector Power Supply - Bad Intelligent Device or Component." It means there is a problem with the injector power supply. Possible causes include a faulty injector, a wiring issue, or a problem with the engine control module (ECM). A professional diagnosis is necessary to determine the precise cause and undertake appropriate repairs.
5. Fault Code 790: This fault code refers to "Engine Overspeed Warning - Critical Level." It indicates that the engine speed has exceeded the recommended maximum limit. This can occur due to driver error, a faulty sensor, or a malfunctioning ECM. It is crucial to investigate the cause of the overspeed condition and rectify it promptly to prevent engine damage.
Please note that these fault codes provide a general indication of the potential issues, but a comprehensive diagnosis by a qualified technician with access to the appropriate diagnostic tools is necessary for accurate identification and repair.

code p 0136 refers to heated oxygen sensor (HO2S) 2 bank 1 ---circuit malfunction===causes ---heating inoperative ---wiring---HO2S--- ECM
also refers to oxygen sensor (O2S0 2 bank 1---circuit malfunction===causes --- wiring---O2S ---ecm
it also refers to heated oxygen sensor (HO2S) 2 bank 1 ---no signal===causes ---wiring --- HO2S---
code p 0137 refers to HO2S 2 bank 1 ---low voltage -===causes --exhaust leak---wiring short to ground ---HO2S--- ECM
it also refers to O2S 2 bank 1---low voltage ===causes exhaust leak---wiring short to ground ---O2S ---ECM
to set you up here-- there are 4 oxygen sensors in the system
2 are heated oxygen sensors (HO2S) on in each exhaust manifold or exhaust pipe before the cat converter and
2 oxygen sensors (O2S) -- one in each exhaust pipe after the cat converters
heated oxygen sensors have 4 wires and O2S sensors normally only 2 wires
it is more that possible that you changed the wrong sensors and in the process damaged the delicate wires with the incorrect spanner being used

The PCV valve lives in the breather pipe going between the inlet and the crankcase and is usually well hidden. Disconnect the breather pipe from the inlet and slide a stiff piece of electrical wire gently down and that hopefully should give you an idea of its exact location.

Either the crankcase is overfilled with oil or the breather for the crankcase is obstructed or the engine is worn and has excessive cylinder blow by past the piston rings.

Which o2 sensor did you replace? on 1996 and newer vehicles there are two o2 sensors: the upstream o2 sensor, which is before the catalytic convertor and moniters the air/fuel ratio in the exhaust. the downstream o2 sensor, which is after the catalytic convertor and moniters the exhaust emissions coming out of the convertor. you should have an error code that will tell you which o2 sensor is faulty, sensor 1 (upstream) or sensor 2 (downstream).

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You had the intake manifold gaskets replaced ,causing
a vacuum leak & thus a lean condition ?

Have the front (2) O2 Sensors been replaced at 100,000 miles
They will be in the converter inlet or pipe before it

Bank 1 is the right or passenger side
If you do an O2 sensor do bothe side if you have daul exhaust

As you said you can not have any vacuum leaks in the ducting
buy the air filter,maf or anywhere

O2 Sensors also come loose from the heat & thus exhaust leaks
& codes
The sensors doesn't know where the air comes from & just reports
what goes past it

Replacing an O2 sensor generally is "fixing the symptom" instead of fixing the cause. A good O2 sensor will often trigger a code if the exhaust mixture it is "seeing" is out of its range to adjust. If the pipe was bad when the sensor was changed, or if another part of the engine management system is out of range, it can cause the new sensor to fail or trigger the check engine light. In your case, I'd clear the codes and see if that helps. If not, you likely will need to do better diagnosis and perhaps again change the sensor if everything else checks out as good.

Hi!
I presume you are describing the Crankcase Breather pipe?
Press The Blue Button Please to appraise My FREE! Effort.
Thank You!
Paul 'W' U.K.

Yes this can cause smoking, the oil is coming up into air cleaner (you may need to change the air filter) through the crankcase breather, the solution drain out the excess oil, do this as soon as possible or you may damage the engine, the O2 sensors, and the Catalytic Converter.