Codes p0011, p0016, p0018 anf p0021 came on what is it

https://www.youtube.com/watch?v=nnQ6F7pKd8s https://www.obd-codes.com/p0713 limited info generic answer your problem may be trans overheating---faulty wiring -- check fluid level and condition ---your vehicle may not overheat but trans can

P0016 refers to the Cam shaft sensor and crank sensor not in sync , the P0011 refers to Variable Valve timing and Variable Camshaft Timing , as the P0016 has shown i would expect that is the issue between these sensors and the PCM , dont waste your time and money on trying to get a cheap fix this is a know issue with VW and a VW dealer will have the appropriate equipment to readily rectify the issue, i think this link will show why is best to go to a VW dealer, but the choice is yours , incidently there is no need to check for electrical issue as is a component based issue so a waste of time and money if your mechanic does the se first tests
VOLKSWAGEN P0011 VVT PERFORMANCE

(powertrain control module, also called an ECM). That consists of a few different components but the P0021 DTC specifically refers to the camshaft (cam) timing. In this case, if the cam timing is above a set limit (over-advanced), the engine light will be illluminated and the code will be set. The "A" camshaft is either the intake, left, or front camshaft. A P0021 engine code is basically the same as a P0011 code, except this is for Bank 2, not Bank 1.
Symptoms Possible sumptoms of OBD code P0021
Most likely a P0021 DTC will result in one of the following: hard starting, poor idle, and/or stalling. There are potentially other symptoms as well. Of course, when trouble codes are set, the MIL (malfunction indicator lamp, a.k.a. the check engine light) illuminates.
Causes Possible causes of OBD code P0021
A P0021 DTC trouble code may be caused by one or more of the following:
Possible Solutions This DTC code is a result of a mechanical fault of the VCT unit or related components, so there is no need for electrical diagnosis. Refer to vehicle specific repair manual to perform component tests for the VCT unit. Notes: Dealer techs have advanced tools and the ability to follow detailed troubleshooting steps, including the ability to test components using a scan tool.

Causes may include:

• Timing chain stretched, or timing belt skipped a tooth due to wear
• Misalignment of timing belt/chain
• Tone ring on crankshaft slipped/broken
• Tone ring on camshaft slipped/broken
• Bad crank sensor
• Bad cam sensor
• Damaged wiring to crank/cam sensor
• Timing belt/chain tensioner damaged

1. First, visually inspect the cam and crank sensors and their harnesses for damage. If you notice broken/frayed wires, repair and recheck.
2. If you have access to a scope, check the cam and crank patterns. If a pattern is missing, suspect a bad sensor or a slipping tone ring. Remove the cam gear and the crankshaft harmonic balancer and inspect the tone rings for proper alignment and make sure they're not loose or damaged or that they haven't sheared the key that aligns them. If they are properly installed, replace the sensor.
3. If the signal appears normal, then check the timing chain/belt for proper alignment. If it's misaligned, check for a damaged tensioner that may have allowed the chain/belt to slip a tooth or several teeth. Also check that the belt/chain isn't stretched. Repair and recheck

Well code 11 is for a problem with the cam sensor signal on bank one and code 21 is the same issue with the sensor on bank two.
Its possible the timing belt has jumped.

https://www.obd-codes.com/p0016

https://community.cartalk.com/t/chysler-pt-cruiser-p0016-engine-code/91093

http://www.ptcruiserlinks.com/forum/tech-performance-forum/27597-code-p0016.html

Hope these help

P0011 "A" Camshaft Position - Timing Over-Advanced or System Performance (Bank 1)
P0021 "A" Camshaft Position - Timing Over-Advanced or System Performance (Bank 2)

You got two codes for Timing Over
Advanced

P0011-Bank 1
P0021-Bank 2

I'am assuming you know that

Cams moved, I would think,
when you did tensioners !!

Or , you have to reset the sensors,
of which I don't know your system

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 ,