• Reading Codes
Reading Codes can be done with the key on engine off (KOEO) or
with the key on engine running (KOER).
Stored Codes are also known as “hard codes”, which are fault codes,
or trouble codes that have been stored in the vehicle computer
memory because the faults have reoccurred for more than a
specified amount of key-cycles. These codes will cause the control
module to illuminate the malfunction indicator light (MIL) when
emission-related fault occurs.
Pending Codes are also referred to as “maturing codes” or
“continuous monitor codes”. They indicate problems that the control
module has detected during the current or last driving cycle but are
not considered serious yet. Pending Codes will not turn on the
malfunction indicator lamp (MIL). If the fault does not occur within a
certain number of warm-up cycles, the code clears from memory.
Permanent Codes are DTCs that are "confirmed" and are retained in
the non-volatile memory of the computer until the appropriate
monitor for each DTC has determined that the malfunction is no
longer present and is not commanding the MIL on. Permanent DTC
shall be stored in non - volatile memory and may not be erased by
any diagnostic services or by disconnecting power to ECU.
1. Use Direction button to select Read Codes from Diagnostic Menu
and press OK button.
2. Use the Direction button to select Stored Codes or Pending Codes
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