Pending Codes

Pending codes appear when a problem is detected in a monitored system. The Malfunction Indicator Light (MIL) is illuminated when a problem is detected in 2 consecutive drive cycles. The pending code is stored in PCM during first drive cycle when a failed system is detected. If problem is not detected during second drive cycle, PCM concludes that system has returned to normal or problem was mistakenly detected, and deletes pending code. If problem is detected during a second drive cycle, PCM concludes that system has failed, deletes pending code, and stores Diagnostic Trouble Code (DTC).