DTCs Current and History

The Instrument Panel Cluster (IPC) has the ability to display stored DTCs as current or history codes. If a current DTC is stored and the malfunction is no longer present, some current DTCs will remain current until the first ignition cycle, others will go history when the malfunction is no longer present and does not require an ignition cycle. History DTCs are intermittent malfunctions and must be diagnosed different than current DTCs. Refer to Intermittents and Poor Connections Diagnosis for a complete description on how history DTCs are used to diagnose intermittent malfunctions. If a malfunction does not recur within 50 ignition cycles the system that indicated a malfunction will automatically clear the DTC.