P064E
Internal Control Module O2 Sensor Processor Performance Bank 2
An internal self-test in the control module reports a fault in its processing of the "oxygen sensor processing, bank 2" value. The module computes and cross-checks this value redundantly inside its own processor; when the results disagree, the code sets. It points to a hardware or software fault inside the module itself, not to a defect of the external sensor. Causes are an internal processor or memory fault, corrupted control-module software, or low or disturbed module supply voltage.
An internal self-test in the control module reports a fault in its processing of the "oxygen sensor processing, bank 2" value. The module computes and cross-checks this value redundantly inside its own processor; when the results disagree, the code sets. It points to a hardware or software fault inside the module itself, not to a defect of the external sensor. Causes are an internal processor or memory fault, corrupted control-module software, or low or disturbed module supply voltage.
Common causes
- high
Internal software anomaly
One of the most commonly reported causes for this code — check this first.
Typical part cost: $440-2750
- low
Module software outdated, reflash may resolve
Less common, but worth ruling out after the more likely causes.
Typical part cost: $440-2750
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First things to check
- 1Confirm the code with a scan tool and check for additional related codes.
- 2Inspect the relevant sensors, wiring, and connectors for damage or corrosion.
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Related codes
See related trouble codes
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Frequently asked questions
What does P064E mean?
P064E means "Internal Control Module O2 Sensor Processor Performance Bank 2". It is a generic OBD-II code that points to a fault in the computer & auxiliary output controls.
What are the most common causes of P064E?
internal software anomaly; module software outdated, reflash may resolve; supply voltage outside specification — these are the most commonly reported causes. Verify with a proper diagnosis before replacing parts, or use the Wrenchify app for a vehicle-specific diagnosis.
Can I keep driving with this code?
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical. Use the Wrenchify app for a full diagnosis specific to your vehicle.
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