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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