Diagnostic Trouble Codes (DTCS)
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A diagnostic trouble code (DTC) is stored if the control module detects a fault. A fault which is detected in the most recent operating cycle is defined as permanent. Other faults are defined as intermittent.
Should a fault disappear for any reason after being permanently stored in the control module as a diagnostic trouble code (DTC), the information remains stored in the control module.
If a fault is no longer permanent, the diagnostic trouble code (DTC) remains as intermittent.