Discussion:
Clark code 994 (SERVICE FAULT 4)

Clark C25 ser# C232L-0275-9664KF, does anyone know what this means? First time I've run into this code and not sure of it's cause.
  • Posted 31 Dec 2010 03:36
  • By joe_d
  • joined 25 May'10 - 253 messages
  • Texas, United States
Ain't nothing I can't fix but a broken heart and the break of day!
Showing items 1 - 4 of 4 results.
Thanks alot. Just ordered it!
  • Posted 6 Jan 2011 02:23
  • By joe_d
  • joined 25 May'10 - 253 messages
  • Texas, United States
Ain't nothing I can't fix but a broken heart and the break of day!
there is only 1 on your unit.
Doosan uses the same fuel system and on there Tier III trucks they use 2 sensors. 1 pre-catalyst & 1 post-catalyst
Clark still only uses 1 O2 sensor.
  • Posted 6 Jan 2011 01:38
  • By bruce_c
  • joined 28 Jul'10 - 52 messages
  • Missouri, United States
Thanks for the info, Bruce. I located the one on the top of the exaust manifold but if there's 2, where is the other located?
  • Posted 5 Jan 2011 22:06
  • By joe_d
  • joined 25 May'10 - 253 messages
  • Texas, United States
Ain't nothing I can't fix but a broken heart and the break of day!
Code 994
Service interval 4 has been reached. time to replace the HEGO sensors. (O2 sensors)

replace the O2 sensors and clear the fault code.
  • Posted 5 Jan 2011 14:11
  • By bruce_c
  • joined 28 Jul'10 - 52 messages
  • Missouri, United States

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The two internal cavities in our nose called nostrils function as separate organs. Each nostril has its own set of turbinates and olfactory receptors. The two independent organs work together through a mechanism called the nasal cycle, where one nostril is dominant for air intake while the other rests and is better at detecting scents.
Fact of the week
The two internal cavities in our nose called nostrils function as separate organs. Each nostril has its own set of turbinates and olfactory receptors. The two independent organs work together through a mechanism called the nasal cycle, where one nostril is dominant for air intake while the other rests and is better at detecting scents.