Error code E27, ink absorber is full. Call service.

So you probably have a Canon Pixma printer with an error code E27 = "Waste ink absorber full or platen waste ink absorber full".
These two tutorial videos will teach you:

1. How to clean the MAIN ink absorbers: http://www.youtube.com/watch?v=VVpjqBr7KjU&feature=fvwrel

But there's a second ink absorber - the PLATEN one - which he does not talk about. The PLATEN is in the black plastic directly underneath the printhead as it slides back and forth. CLEAN THE PLATEN TOO before following the Part 2 video to reset both the MAIN and PLATEN ink absorbers in your software. And don't repeat his mistake when putting the printer back together - the springs he points to at 4:30 WILL fall out!

2. How to reset your printer's internal firmware to remove error alert: http://www.youtube.com/watch?v=4IrBdw7el2E&feature=fvwrel

P.S. Of course it is much easier to bring it to ther printer service (even better if your warranty service can do it for free, if the full ink absorbers error was not caused by too intensive printing, i.e. not your fault).

reset the waste ink absorber,e27=ink absorber full

Those two are error codes, and they mean the following:

E8 - The waste ink absorber is almost full. Press the OK button to clear the error.
Printing can be done until the waste ink absorber becomes full. If the waste ink absorber becomes full, please contact your local Service Center for replacement of the absorber and machine maintenance.
The waste ink absorber is a part inside the machine, which absorbs ink used in the cleaning operations, etc.

E27 - Manual does not specify what this means, but tells you what you should do: Turn the machine off, and remove the power plug from the outlet. About ten minutes later, plug it in again, and turn the machine on. If the problem is not resolved, the machine may require servicing. Please contact your local Service Center.
You can read more about the error codes on Canon website.

Use this method with your own risk!!

E2-2 = No paper (ASF)
E3-3 = Paper jam
E4 = No ink
E5-5 = The ink cartridges are not installed or a non-supported ink cartridge is installed, or the ink cartridges are not installed properly
E8 = Waste ink absorber full, or platen waste ink absorber full
E9 The connected digital camera / video camera does not support Camera
Direct Printing
E14 The Ink cartridges whose destination are wrong
E15 Ink cartridge is not installed E16 - Ink remaining is unknown
E16 -E19 Failed to scan head alignment sheet
E22 Carriage error
E23 Paper feed error
E24 Purge unit error
E25 ASF(cam) sensor error
E26 Internal temperature rise error
E27 Waste ink absorber full or platen waste ink absorber full
E28 Ink cartridge temperature rise error -
E29 EEPROM error
E33 Paper feed position error
E35 15 USB Host VBUD overcurrent error - USB
E37 17 Abnormal motor driver error
E40 20 Other hardware error
E42 22 Scanner error

Reset E27 Waste ink absorber full or platen waste ink absorber full for Mp170

firstly download MPTOOL
Download here
Download manual guide how to use MPtool
download here

OK hope this can help

You need to reset it.

Use this method with your own risk!!
E2-2 = No paper (ASF)
E3-3 = Paper jam
E4 = No ink
E5-5 = The ink cartridges are not installed or a non-supported ink cartridge is installed, or the ink cartridges are not installed properly
E8 = Waste ink absorber full, or platen waste ink absorber full
E9 The connected digital camera / video camera does not support Camera
Direct Printing
E14 The Ink cartridges whose destination are wrong
E15 Ink cartridge is not installed E16 - Ink remaining is unknown
E16 -E19 Failed to scan head alignment sheet
E22 Carriage error
E23 Paper feed error
E24 Purge unit error
E25 ASF(cam) sensor error
E26 Internal temperature rise error
E27 Waste ink absorber full or platen waste ink absorber full
E28 Ink cartridge temperature rise error -
E29 EEPROM error
E33 Paper feed position error
E35 15 USB Host VBUD overcurrent error - USB
E37 17 Abnormal motor driver error
E40 20 Other hardware error
E42 22 Scanner error

Reset E27 Waste ink absorber full or platen waste ink absorber full

You need Mptool to reset your mp170
download mptool here

Manual guide to use mptool
download manual guide here

Canon error e27 ink absorber full/reset process

printer powered off but connected on power source , you must:
1. Press & hold stop/reset button, and then press & hold [ON/OFF] button.
2. When Green power lit, leave stop/reset button & press twice stop/reset (see orange indicator).
3. Leave On/Off button. Printer in actually service mode.
4. Press stop/reset 4 times (see orange indicator) if not blink restart above process from top.
5. After press stop/reset 4 times successful press On/Off button 3 times. printer will off.
6. Press On/Off button.

you need to replace the absorber waste ink pad and service the printer

www.fixyourownprinter.com

ERROR CODE CANNON MP150/MP160

E2 - No paper (ASF)
E3 - Paper jam
E4 - No ink
E5 - The ink cartridges are not installed or a non-supported ink cartridge is installed , or the ink cartridges are not installed properly
E8 - Waste ink absorber full, or platen waste ink absorber full «ОК»)
E9 - The connected digital camera / video camera does not support Camera Direct Printing
E14 - The Ink cartridges whose destination are wrong
E15 - Ink cartridge is not installed
E16 - Ink remaining is unknown
E19 - Failed to scan head alignment sheet
E22 - Carriage error
E23 - Paper feed error
E24 - Purge unit error
E25 - ASF(cam) sensor error
E26 - Internal temperature rise error
E27 - Waste ink absorber full or platen waste ink absorber full
E28 - Ink cartridge temperature rise error -
E29 - EEPROM error
E33 - Paper feed position error
E35 - USB Host VBUD over current error - USB
E37 - Abnormal motor driver error
E40 - Other hardware error
E42 - Scanner error

This is what the manual says: Ink used for cleaning is absorbed in a waste ink absorber placed in the machine. Press [OK] to cancel the error so that you can continue printing. Once the waste ink absorber becomes completely full, printing cannot be done until the waste ink absorber is replaced.
Canon recommends to contact a Canon service representative as soon as possible.

GRACIAS POR TU APORTACION, ME FUNCIONO A LA PERFECCION