Detection Condition

PCM monitors Short Term Fuel Trim (SHRTFT) and Long Term Fuel Trim (LONGFT) values while under closed loop fuel control. If fuel trim exceeds preprogrammed criteria, PCM determines fuel system is too lean. This is a Continuous Monitor (fuel). MIL illuminates if PCM detects above malfunction condition in two consecutive drive cycles or in one drive cycle while DTC for same malfunction has been stored in PCM. PENDING CODE is available if PCM detects malfunction conditions during first drive cycle. FREEZE FRAME DATA is available. DTC is stored in PCM memory.