How do I fix error code 0018 on a magicolor 1690

This is a sample guide;

Well I fixed it!!! Here's what I did. You see this picture of the cover opened? Where the arrow's pointing is the home position of the printer head. Under there I found a scrap piece of paper! Here's exactly what I did. When I got home I decided to plug it in to see if it would work, but it made the same noise and showed the same error message as before. I opened the cover as shown above. This resets it, and it says "close cover". I closed it, and AS it started to go through its routine I OPENED IT again, and I could see the printer head moving back and forth. At this point I used a flashlight to see where the home position of the Head was, and that's where I found the scrap of paper!
I unplugged it for safety and was able to remove the scrap with my fingers.
By your descriptions, referring to the other users, you just might have the same problem.

Hope this may help;

Regards,
VOTIT

do you mean a magic Color 1690

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/normanj_7893313f0751935f

1. Step 1
Turn the printer off and on to see if it can automatically clear some or all of the jam. Many printers provide an error-code listing on the front panel display for the area where the jam occurred. If your printer shows an error code, be sure and check the printer manual to see if that identifies the area of the printer where the jam occurred.
2. Step 2
Turn off the printer.
3. Step 3
Remove any paper trays. Inspect them for wrinkled or damaged paper.
4. Step 4
Open any other doors that give access to the printer's paper path and to the toner or ink cartridge.
5. Step 5
If necessary, remove the toner or ink cartridge. Place it in a bag or away from light to avoid damaging it.
6. Step 6

jQuery(document).ready(function(){ jQuery('#jsArticleStep6 span.image a:first').attr('href','http://i.ehow.co.uk/images/a00/3f/31/clear-printer-paper-1.6-800X800.jpg'); }); If you find a piece of jammed paper, remove it by holding it with both hands and pulling firmly. The goal is to keep the paper from tearing. If several pieces are jammed together, try pulling out the middle piece first to loosen the jam.
7. Step 7

jQuery(document).ready(function(){ jQuery('#jsArticleStep7 span.image a:first').attr('href','http://i.ehow.co.uk/images/a00/3f/31/clear-printer-paper-1.7-800X800.jpg'); }); If the paper does tear, try rotating the roller gears manually to free the paper . Don't force anything, though.
8. Step 8
Replace the toner or ink cartridge and paper trays, close any doors you opened and turn the printer back on.
9. Step 9
If the printer paper jam message still appears, then there is still some paper in the printer. Reinspect the paper path.

Step 1 Turn the printer off and on to see if it can automatically clear some or all of the jam. Many printers provide an error-code listing on the front panel display for the area where the jam occurred. If your printer shows an error code, be sure and check the printer manual to see if that identifies the area of the printer where the jam occurred.

Step 2 Turn off the printer.

Step 3 Remove any paper trays. Inspect them for wrinkled or damaged paper.

Step 4 Open any other doors that give access to the printer's paper path and to the toner or ink cartridge.

Step 5 If necessary, remove the toner or ink cartridge. Place it in a bag or away from light to avoid damaging it.

Step 6 jQuery(document).ready(function(){ jQuery('#jsArticleStep6 span.image a:first').attr('href','http://i.ehow.com/images/ehows/steps/books/266_b1.jpg'); }); If you find a piece of jammed paper, remove it by holding it with both hands and pulling firmly (see A). The goal is to keep the paper from tearing. If several pieces are jammed together, try pulling out the middle piece first to loosen the jam.

Step 7 jQuery(document).ready(function(){ jQuery('#jsArticleStep7 span.image a:first').attr('href','http://i.ehow.com/images/ehows/steps/books/266_a2.jpg'); }); If the paper does tear, try rotating the roller gears manually to free the paper (see B). Don't force anything, though.

Step 8 Replace the toner or ink cartridge and paper trays, close any doors you opened and turn the printer back on.

Step 9 If the printer paper jam message still appears, then there is still some paper in the printer. Reinspect the paper path.

Try two things:

Fan the paper before placing in the tray.

Raise the humidity in the room to at least 40% to avoid electrostatic sticking of the paper. Store paper in 40% humidity area.

Step 1
Turn the printer off and on to see if it can automatically clear
some or all of the jam.Many printers provide an error-code listing
on the front panel display for the area where the jam occurred.If
your printer shows an error code, be sure and check the printer
manual to see if that identifies the area of the printer where the
jam occurred.
Step 2
Turn off the printer.
Step 3
Remove any paper trays. Inspect them for wrinkled or damaged paper.
Step 4
Open any other doors that give access to the printer's paper path
and to the toner or ink cartridge.
Step 5
If necessary,remove the toner or ink cartridge.Place it in a bag
or away from light to avoid damaging it.
Step 6
If you find a piece of jammed paper,remove it by holding it with
both hands and pulling firmly.If several pieces are jammed together
try pulling out the middle piece first to loosen the jam.
Step 7
If the paper does tear,try rotating the roller gears manually to
free the paper.
Step 8
Replace the toner or ink cartridge and paper trays,close any doors
you opened and turn the printer back on.
Step 8
If the printer paper jam message still appears,then there is still
some paper in the printer.Reinspect the paper path.

I believe the duplex door is in the back of the printer.

Here is the Xerox support page for your printer. It even has a movie on removing paper jams.
http://www.office.xerox.com/perl-bin/product.pl?page=sprt&product=8400&country=United%20States&language=en#_manuals_and_documentation_

This indicates there is a paper in the fuser area(very Hot section be cautious).1. open the front door.2, open the left side door. look inside for a green plastic handle & lift up he metal guide plate sometimes the paper gets wrapped around the upper heat roller or curled up and around the separator claws. if so be very careful not to scratch the rollers or break the sep claws. there is a green handle/knob located in the machine that can be turned, this turns the fuser rollers and makes it a little easier to remove a fuser paper jam. After you remove the paper jam close all the doors/panels you first opened. the copier should reset itself. I have seen the pj errors change to a new one indicating another pj still exists. if so look again and remove as indicate by the Lcd screen. Please leave positive feedback if this helps