P0064Low SeverityEmissions

HO2S Heater Circuit High (Bank 2, Sensor 3)

What This Means

The oxygen sensor heater at bank 2, sensor 3 is reading high voltage. A short to battery power is preventing normal heater operation.

Common Symptoms

Check engine light on
No drivability issues
Higher emissions
May fail emissions test

Common Causes

Short to power
Failed sensor
Wiring issue
Connector fault
PCM circuit high

Estimated Repair Cost

$100 – $400

Parts and labor (varies by vehicle and location)

Difficulty:Easy

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For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.