Engine-Codes - Generic - P0064

P0064 Code - HO2S Heater Control Circuit High Bank 2 Sensor 3

- Code Popularity: 14,951 Views
- Repair Importance Level: 2/3
- Repair Difficulty Level: 2/3
Table of contents

What are the Possible Causes of the Code P0064?

  • Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 3
  • Heated Oxygen Sensor (H2OS) Bank 2 Sensor 3 harness is open shorted
  • Heated Oxygen Sensor (H2OS) Bank 2 Sensor 3 circuit poor electrical connection
  • Heated Oxygen Sensor (H2OS) Bank 2 Sensor 3 circuit fuse
  • Faulty Engine Control Module (ECM)

How to Fix the P0064 Code?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

What is the Cost to Diagnose the Code P0064?

Labor: 1.0

The cost to diagnose the P0064 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

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When is the P0064 Code Detected?

The P0064 is set when the ECM detects an excessively high voltage through the heated oxygen sensor heater circuit

What are Code P0064 Possible Symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

What Does the P0064 Code Mean?

Oxygen Sensors (O2S) or Heated Oxygen Sensors (HO2S) need to reach a minimum operating temperature of 750 degrees F to produce an accurate voltage signal. The faster the heated oxygen sensor reaches that temperature the faster the sensor will start sending an accurate signal to the Engine Control Module (ECM).
In order to achieve the require temperature, a heater element is included inside the heated oxygen sensor. The ECM controls the heated oxygen sensor heater element based on signals from the engine coolant temperature and engine load. The ECM controls the heater element circuit by allowing current flow to ground.
The ECM monitors the voltage signal received through the heater element circuit and determines the state of the circuit by comparing the voltage detected with the factory specifications.
P0064 Code - HO2S Heater Control Circuit High Bank 2 Sensor 3

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