What are the common causes of P064E?

An internal PCM oxygen sensor processor fault. Corrupted PCM software. A wiring fault on the bank 2 O2 sensor circuit. A poor PCM ground. A failed PCM.

Scan for bank 2 O2 sensor codes. Inspect the bank 2 O2 sensor wiring and connectors. Check the O2 sensor signal on a scan tool. Check the PCM grounds. Replace the PCM if the O2 processor fault returns with sensors good. Clear the code and retest.

P064E

Internal Control Module O2 Sensor Processor Performance Bank 2

System: Computer output circuits (P code)
Lamp: Check Engine Light
Category: Powertrain - Computer and Auxiliary Controls

What it means

P064E means Internal Control Module O2 Sensor Processor Performance Bank 2.

Where it lives

For P064E, the description names the sensor as the part involved. The description of P064E puts it on bank 2.

Check these first

An internal PCM oxygen sensor processor fault
Corrupted PCM software
A wiring fault on the bank 2 O2 sensor circuit
A poor PCM ground
A failed PCM

What to do next

Scan for bank 2 O2 sensor codes
Inspect the bank 2 O2 sensor wiring and connectors
Check the O2 sensor signal on a scan tool
Check the PCM grounds
Replace the PCM if the O2 processor fault returns with sensors good
Clear the code and retest

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Updated

Generic SAE J2012 definition. Last updated 2026-10-10.