With Generic Scan Tool
Diagnostic CodesThe Sensing and Diagnostic Module (SDM) maintains a history record of all diagnostic codes that have been detected since the SRS codes were last cleared during service.
1. Active Codes-Faults that are presently detected this ignition cycle. Active codes are stored in RAM (Random Access Memory).
2. History Codes-All faults detected since the last time the history fault memory was cleared. History codes are stored in EEPROM. (Electronically Erasable Programmable Read only Memory)
How to Clear Trouble Codes
Trouble codes can only be cleared by using a scan tool. If a scan tool is not available then inform the owner of the stored codes and suggest that the codes are cleared upon the next visit to a dealership.