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 Read Trouble Codes
All codes (Active and history) can be read (or cleared) by using a scan tool or equivalent.
If a DTC is not available have the vehicle serviced by dealer.