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Read Trouble Code
Read trouble codes (DTCs) that are stored in ECU. For the trouble code, the
diagnostic tool will give specific detailed definitions and explanations to help you
locate and eliminate the car fault.
Stored Code
Stored codes are the current emission-related DTCs from the ECM of the
vehicle. OBDII Codes have a priority according to their emission severity, with
higher priority codes overwriting lower priority codes. The priority of the code
determines the illumination of the MIL and the codes erase procedure.
Manufacturers rank codes differently, so expect to see differences between
makes.
Pending Code
These are codes whose setting conditions were met during the last drive cycle,
but need to be met two or more consecutive drive cycles before the DTC
actually sets. The intended use of this service is to assist the service
technician after a vehicle repair and after clearing diagnostic information, by
reporting test results after a driving cycle.
c. If a test failed during the driving cycle, the DTC associated with that test
is reported. If the pending fault codes do not occur again within 40 to 80
warm-up cycles, the fault is automatically cleared from memory.
d. Test results reported by this service do not necessarily indicate a faulty
component or system. If test results indicate another failure after
additional driving, then a DTC is set to indicate a faulty component or
system, and the MIL is illuminated.
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