Reading and Clearing Diagnostic Trouble Codes
TROUBLE CODE ERASUREDiagnostic Trouble Codes can be erased in two ways. The first is to erase the DTC with the DRBIII or scan tool. The second is if the DTC is no longer present, the DTC is reset by the TCM (after an ignition cycle), which will place the DTC in an intermittent status (Stored DTC).
When there are no diagnostic trouble codes stored in memory, the DRBIII will display (NO DTCs DETECTED)