Detection Condition

WARNING: This page is about a different car, the 2003 Mazda Protege5 and 2003 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.

PCM monitors input signal from Knock Sensor (KS) when monitoring conditions are met.

Monitoring Conditions

Engine load is more than 50 percent.
Engine coolant temperature is more than 140°F (60°C).
Engine speed is 1500-5000 RPM

If PCM does not receive input signal from KS for 5 seconds, PCM determines that KS circuit is malfunctioning. This is a Continuous Monitor (CM). MIL illuminates if PCM detects malfunction condition during first drive cycle. Pending code is not available. Freeze Frame Data is available and DTC is stored in PCM memory.