Set Condition

Code P0321 will set when the following conditions are present.

• PCM detects 150 fuel control reference pulses (50 crank revolutions) and no spark reference pulses.
• Engine speed is less than 1200 RPM.
• Engine is running.

Fuel reference signal is used by PCM to control ignition timing advance when conditions for setting Code P0321 are present. This condition will cause module mode to be used for ignition timing less than 400 RPM and PCM controlled ignition timing to be degraded less than 1200 RPM.