Detection Condition

DTC is set when Powertrain Control Module (PCM) monitors inversion cycle period, lean-to-rich response time and rich-to-lean response time of frontHO2S. PCM calculates average of inversion cycle period-specified inversion cycles, average response time from lean-to-rich; and rich-to-lean. If any exceeds threshold, PCM determines that circuit has malfunction when drive mode 3 and following conditions are met:

• Calculation load is 16-50 percent (MT), 20-50 percent (AT) at engine speed 2000 RPM.
• Engine speed is 750-3100 RPM (MT), 810-3100 RPM (AT).
• Vehicle speed is over 3.5 MPH.
• Engine coolant temperature is above 114°F (-10°C).

This is an intermittent monitor. MIL illuminates if PCM detects either malfunction conditions in 2 consecutive drive cycles. Diagnostic monitoring test results is available. Pending code is available if PCM detects malfunction condition during first drive cycle. Freeze Frame Data is available and DTC is stored in PCM memory.