173C332dn

How to Fix Toner Sensor Error 173 on OKI C332dn

Error code 173 on OKI C332dn indicates a communication failure between the printer and the smart chip on the toner cartridge, or that the internal empty sensor is blocked by excess toner dust.

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Common causes

  • 1Toner chip contacts covered in fingerprint oils or toner dust.
  • 2Using incompatible or outdated third-party toner chips.
  • 3Misaligned toner locking lever preventing proper contact connection.
  • 4Faulty or damaged internal toner empty sensor.

Solutions

Resolving Toner Error 173

This fault is generally related to chip placement or dirty reader contacts. Follow these methods:

Method 1: Clean the Toner Chip Contacts

  1. Open the top deck of the OKI C332dn.
  2. Locate the specific toner cartridge indicated by the error message on the LCD panel.
  3. Release the cartridge by pulling the colored locking lever forward.
  4. Examine the metallic contact chip on the toner's underside or side.
  5. Gently wipe the chip using a lint-free dry cloth or a cotton swab slightly dampened with rubbing alcohol.
  6. Clean the matching spring-loaded pins inside the drum tray where the toner sits.
  7. Reinsert the cartridge and make sure you push the colored lock lever fully backward.

Method 2: Inspect Compatible Chip Alignment

If you are using third-party/compatible toners, sometimes the chip is slightly out of its plastic slot alignment. Gently push the chip with a flat tool to make sure it is centered in its bracket so it mates with the printer pins correctly.

Steps to follow

  1. 1

    Extract the Cartridge

    Locate the problematic toner, pull the locking tab, and slide the cartridge out.

  2. 2

    Clean the Gold Contacts

    Use isopropyl alcohol to wipe both the chip and the matching connection pins inside the printer.

  3. 3

    Securely Lock In Place

    Reinsert the cartridge, lock it tightly, and close the top lid.

Frequently asked questions

This suggests either a firmware conflict with a batch of compatible chips or a loose connection on the main drum harness. Reinstall the original OEM cartridges to verify.

Yes, but blow air gently from a safe distance to avoid scattering toner dust onto adjacent optical LEDs.