Clear Trouble Code
It allows clearing current and historical trouble codes (DTCs) memory in ECU,
under the premise that all the troubles are eliminated. There are two types of
trouble codes, one is permanent trouble code and the other is non-permanent
trouble code. The former requires manual troubleshooting of the car before it can
be cleared with a diagnostic tool. Non-permanent trouble codes can be cleared
directly with the diagnostic tool.
Figure 3-8 Sample of clear trouble code screen
The trouble codes cannot be cleared without eliminating all the troubles, the diagnostic tool
can always read those codes as those codes are saved in ECU.
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