Equus 3173 - Import Code Reader - Manual (Page 14)

About Import Vehicle Diagnostic Systems
DIAGNOSTIC TROUBLE CODES
11 Chapter 2
• “Hard” Codes. “Hard” codes are stored for problems
which are happening now. “Hard” codes cause the “Check
Engine” light to turn on. The light remains on as long as
the “hard” code is present.
• “Intermittent” Codes. “Intermittent” codes are stored
for problems, which happened in the past but, are not
currently present or detected by the vehicle’s computer.
Intermittent problems may cause the “Check Engine”
light to flicker by briefly turning on and turning off when
the problem goes away. “Intermittent” codes stay in the
computer’s memory even when the problem is no longer
present. These intermittent problems may be caused by
faulty wiring, vehicle operating conditions, etc.
NOTE: Not all vehicles store “Intermittent” codes.