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Dirty injectors maybe , or throttle plate carboned up , IAC - idle air control problem , EGR valve carboned up . Could be a number of thing's . Hooking up a scan tool an checking engine sensor data may point to the problem .
P-21 - Color regist test pattern failure • The number of points detected in the main scan direction is more or less than the specified value during main scan direction registration correction.
• The number of points detected in the sub scan direction is more or less than the specified value during sub scan direction registration correction. P-21: Color regist test pattern failure
• Transfer belt unit
• PH unit
• Printer control board (PRCB)
1/ Wipe clean the surface of the transfer belt with a soft cloth, if it is dirty.
2/ Change the image transfer belt unit if the transfer belt is damaged.
3/ Change the PH unit.
4/ Change PRCB.
(See Service Manual, pages 599, 603): http://www.imcopexamerica.com/service-books/Bizhub/Color/bizhubC451_C550_C650FieldSvc.pdf
have check engine light checked most auto stores will scan for codes for free ur problem can be any number [100s of trouble codes] of problems .the code will give you a starting point to correct your problem
When your scanner is scanning normally (in only banks 1 and 2 at this point) just hit the number for the banks you want to scan. To remove a bank push that number again. Make sure it the scanner is actually scanning when you do this.
If it is the same code, the problem was not fixed. Could also be another problem that came up while fixing the 1st code ( i.e. knocked a vacuum line off ).
If you do not have a code scanner, Autozone will scan the code for free, get the actual code number and post a comment back to this problem, or start a new one with the code number, and what you have done to this point ( include the 1st code and what you did in what order when attempting to fix that one ).
You really need to have a code scan done. Any number of sensors can be out of range causing the light to come on. Code scan (free at most major parts stores) will point you in the right direction, then you will need to test using a digital multi-meter to check individual components ( haynes or Chilton manuals have instructions and test values) Also check sensor wiring to make sure it's not grounding on the engine or a hot pipe. Test...don't guess.... if you do it can get really expensive really fast. You can do a basic test for codes by turning the key on and off three times, leaving it on the third time (without starting it) The light will flash in sequence, each group is a number eg: three flashes is the #3. numbers will be in groups of two with a pause between. (code 33 would then be three flashes, three flashes then a pause then the following number. Ignore code 55 as that tells you when it's finished. (you will still need the book to know what the codes mean)
It could be caused by a lot of different things, including a fuel injector, spark plug, spark plug wire, low compression, but in most cases it doesnt get to deep. I would start with checking the spark plug wire to cylinder number 5, then the spark plug. Moisture can cause a misfire so make sure the metal contact points are dry.
You should see if your genealogy application can be pointed to scans in a specific folder on your machine. The scan into that folder (give the files friendly names) and point to that folder. When scanning, some scanners "prompt" you for a location for your resulting scan...check this too. One other thing is to see if there are scanning options for a efault "scan to" location.