DTC P064D:00: Notes

DTC P064D:00 (LF, L5) DETECTION CONDITION AND POSSIBLE CAUSE

DTC P064D:00

Internal control module A/F sensor processor performance problem

DETECTION CONDITION

The A/F sensor IC integrated in PCM converts to voltage value for fuel control and for diagnosis based on the A/F sensor signal current and sends to CPU (integrated in PCM). If there is a transmission format error from the A/F sensor IC to the PCM, the PCM will detect a transmission error.

MONITORING CONDITIONS

Drive Mode 03 (EGR System, A/F sensor heater, HO2S heater, A/F sensor, HO2S and TWC Repair Verification Drive Mode)
Following conditions are met:

Engine is running or ignition switch is ON
A/F sensor signal voltage is 1.2V-battery voltage-1.2 V (PCM terminals 2Z, 2AC, 2AD)

Diagnostic support note

This is a continuous monitor (CCM).
The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
The DTC is stored in PCM memory.

POSSIBLE CAUSE

PCM internal malfunction (between CPU and A/F sensor control IC communication line)