DTC P064D-00: Internal Control Module A/F Sensor Processor Performance Problem: Notes

DTC P064D:00	Internal control module A/F sensor processor performance problem
DETECTION CONDITION	The A/F sensor IC integrated in the PCM converts to the voltage value for the fuel control and for the diagnosis based on the A/F sensor signal current and sends to the CPU (integrated in the 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 1.2 V -battery voltage-1.2 V (PCM terminals 2Z, 2AC, 2AD) Diagnostic support note This is a continuous monitor (CCM). The check engine light illuminates if the PCM detects the above malfunction condition during the first drive cycle. FREEZE FRAME DATA (Mode 2)/Snapshot data is available. The DTC is stored in the PCM memory.
FAIL-SAFE FUNCTION	Fixes the duty value of the A/F sensor heater. Stops the fuel feedback control.
POSSIBLE CAUSE	PCM internal malfunction (between CPU and A/F sensor control IC communication line)
SYSTEM WIRING DIAGRAM	-