DTC P053: 4X Reference Signal Interrupt From Ignition Control Module: Description
If the PCM does not receive 4X reference pulses from the Ignition Control Module for more than 0.4 second while the engine is running, Code P053 is set.
If the PCM does not receive 4X reference pulses from the Ignition Control Module for more than 0.4 second while the engine is running, Code P053 is set.