Canon Printer Error 6D00 — What It Means & How to Fix It

What Does This Error Mean?

Error 6D00 on Canon printers signals a failure in the purge unit drive mechanism. The purge unit is the internal assembly responsible for cleaning the printhead — it moves, wipes, and caps the printhead to keep nozzles clear. When the drive motor or gear train for this unit fails or stalls, the printer stops and displays 6D00.

Affected Models

Canon Pixma MG7120 Series
Canon Pixma MG6420 Series
Canon Pixma MX892
Canon Pixma MG5420 Series
Canon Pixma iP8720

Common Causes

Dried ink has cemented the purge unit gears, preventing the drive motor from turning them
The purge unit drive motor has failed electrically after years of use
A foreign object or paper scrap has fallen into the purge unit gear train and jammed it
The waste ink absorber is completely full, which caused ink to back up and seize the drive mechanism
The purge unit's home position sensor is faulty and does not confirm that the mechanism has returned to start position

How to Fix It

Turn the printer off completely and unplug the power cord from the wall. Wait at least 5 minutes to let any electrical charge dissipate. Then plug back in and turn on.

A small number of 6D00 errors are caused by a temporary sensor misread that a full power cycle clears.
Check for and reset the waste ink absorber. A full absorber is a common underlying cause of purge drive errors. Download the Canon service resetter tool and reset the waste ink counter if it is at or near its limit.

If the absorber is also full, clearing it first gives you the best chance of resolving 6D00 as a secondary effect.
Try running the printhead cleaning utility from Canon's software on your computer. Some stalled purge drives will respond to a commanded cleaning cycle and complete the motion needed to reset the error.

If the printer cannot start the cleaning cycle at all and immediately shows 6D00, skip to the next step.
If you have technical confidence, consult a disassembly guide for your specific Canon model. The purge unit is typically accessible by removing the printer's base panel. Inspect the gear train for obvious jams or dried ink bridges between gear teeth.

Dried ink bridges between gear teeth can sometimes be dissolved with a drop of isopropyl alcohol applied carefully with a toothpick.
Contact Canon support or a local repair shop if self-repair is not practical. Give them your printer model number (found on the base sticker) and describe the error. Ask specifically about purge unit replacement cost versus the price of a new printer.

For older or low-cost Canon models, buying a new printer is often cheaper than a full purge unit replacement by a shop.

When to Call a Professional

Error 6D00 usually requires opening the printer to physically inspect and free the purge unit drive. This is beyond what most users can do at home without repair guides and the right tools. Canon-authorized service centers are the safest option. In some cases the entire purge unit assembly must be replaced.

Frequently Asked Questions

What is the purge unit and why does it matter so much?

The purge unit is a small mechanical assembly inside your printer that cleans the printhead. It has a rubber cap that covers the nozzles when idle (to prevent them from drying out), a wiper blade that sweeps across the nozzles, and a suction pump that pulls ink through to clear clogs. When it fails, the printer cannot clean itself and locks out all printing to prevent damage.

My printer is 4 years old and developed 6D00 suddenly. Is that normal?

Yes — the purge unit is a wear item. After thousands of cleaning cycles over several years, the gears, wiper, and pump all wear down. Sudden failure after years of normal use is not unusual. The only question is whether repair is worth it compared to the cost of a new printer.

Will Canon repair my printer for free under warranty for a 6D00 error?

If your printer is within its warranty period — typically one year from purchase — yes, Canon should cover the repair. Bring your proof of purchase. If the printer is out of warranty, you will pay for parts and labor. Canon's flat-rate mail-in repair programs, where available, can sometimes offer good value for this type of repair.