Heated Oxygen Sensor Heater Control Circuit High (Bank 2, Sensor 3)
The P0064 code means the vehicle's onboard diagnostic system has detected: Heated Oxygen Sensor Heater Control Circuit High (Bank 2, Sensor 3). This is a low severity code.
- Keep driving?
- Yes, but fix soon
- DIY difficulty
- moderate
- Estimated cost
- $100 - $300 (parts and labor)
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What Are the Symptoms of P0064?
- Check Engine Light on
- Minor fuel economy impact
- No noticeable drivability symptoms
- Emissions inspection failure
What Causes P0064? (Most Likely First)
- Short circuit in O2 sensor heater wiring Very High
- Internally shorted heater element High
- Water intrusion in sensor connector Moderate
- ECM heater driver issue Low
Can I Still Drive with P0064?
Yes, but fix soon. P0064 is rated low severity. It is not an immediate stop-driving fault, but it will not clear itself — book the repair rather than ignoring the light.
Frequently Asked Questions
What does P0064 mean?
P0064 indicates a high voltage condition in the heater circuit of Bank 2 Sensor 3, usually due to a short in the wiring or sensor.
Can P0064 cause other problems?
P0064 by itself does not cause significant problems beyond emissions issues. However, a short circuit could potentially blow a fuse affecting other sensors.
What is the fix for P0064?
Repair the short circuit in the wiring or replace the O2 sensor. Also check for water intrusion at the connector.
Mechanics Guide Step-by-step diagnosis
How Do You Diagnose P0064?
-
Confirm P0064 with scan tool
-
Inspect Bank 2 Sensor 3 wiring for short circuits
-
Measure heater element resistance
-
Check connector for moisture or corrosion
Sources 2
This page is built from documented references. Verify against your own service info before repair work.
- SAE J2012Diagnostic Trouble Code Definitions (defines the generic OBD-II code ranges)
- Cross-checked against the SAE J2012:2002 DTC table (2026-08-27)archived scan of the SAE standard — readable copy, not SAE’s current edition
Which Vehicles Commonly Get P0064?
- 2008-2017 Honda Pilot
- 2010-2019 Lexus RX350
- 2007-2016 Toyota Highlander
- 2009-2018 Nissan Murano
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