P064D - Internal Control Module O2 Sensor Processor Performance - Bank 1
WARNING: This page is about a different car, the 2010 Mercury Mariner and 2010 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
P064D - INTERNAL CONTROL MODULE O2 SENSOR PROCESSOR PERFORMANCE - BANK 1
| Description: | The powertrain control module (PCM) monitors the application-specific integrated circuit that controls and monitors the universal heated oxygen sensor (HO2S). The test fails when the PCM detects an internal circuit or communication concern. | ||
| Possible Causes: |
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| Diagnostic Aids: | Internal PCM concern. Reprogram or update the calibration. Check for other DTCs and diagnose those first. Make sure to check for aftermarket performance products before installing a new PCM. Clear the DTCs, repeat the self-test. If the DTC is retrieved again, install a new PCM. Refer to FLASH ELECTRICALLY ERASABLE PROGRAMMABLE READ ONLY MEMORY (EEPROM) , Programming the VID Block for a Replacement PCM. | ||
| Application | Key On Engine Off | Key On Engine Running | Continuous Memory |
| All | Refer to the P0685 - ELECTRONIC CONTROL MODULE (ECM)/POWERTRAIN CONTROL MODULE (PCM) POWER RELAY CONTROL CIRCUIT/OPEN Description, Possible Causes and Diagnostic Aids for the DTC. | ||