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Bobcat · Engine

Bobcat code M0116: Air filter sensor not connected

What it means

The controller can't see the air filter restriction switch, so it can't warn you about a plugged filter.

Can I keep running?

Keep going carefully, fix soon

Usually, if the machine runs normally: finish the job carefully and fix it soon. Stop if the machine derates, overheats, loses power or the code comes with an alarm.

Check first

  1. Park on level ground, lower the lift arms and attachment to the ground, stop the engine and remove the key.
  2. Check the connector on the air filter switch at the air cleaner housing and reseat it.
  3. Inspect the wire to the switch for damage.
  4. Check the air filter condition by hand while the switch is out of action.
  5. Restart and see if the code comes back. If it does, stop and call your Bobcat dealer.

Likely causes

  • Unplugged air filter switch connector
  • Broken or corroded wire to the switch
  • Failed switch

The fix

Reconnecting or repairing the switch wiring fixes it. Replace the switch if the wiring is fine. Keep checking the air filter yourself until it's fixed.

Different code on your screen? Snap the display and Mechy reads it.

Related engine codes

All Bobcat codes

Questions

What does Bobcat code M0116 mean?

Air filter sensor not connected. The controller can't see the air filter restriction switch, so it can't warn you about a plugged filter.

Can I keep running with M0116?

Usually, if the machine runs normally: finish the job carefully and fix it soon. Stop if the machine derates, overheats, loses power or the code comes with an alarm.

How do I fix Bobcat code M0116?

Reconnecting or repairing the switch wiring fixes it. Replace the switch if the wiring is fine. Keep checking the air filter yourself until it's fixed.

Sources

  1. Bobcat Company, Diagnostic Service Codes list (fault codes PDF, 2020)
  2. Bobcat T450 Operation & Maintenance Manual 7250077 (2018), Diagnostic Service Codes
  3. BigRentz, Full List of Bobcat Fault Codes (searchable table)

Code meanings vary by model, serial range and software. Confirm with your operator's manual or Bobcat dealer before replacing parts.

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