O2 Heater

O2 Heater

An O2 Heater is used to heat Narrowband O2 Sensors so that O2 Control can begin immediately after startup. The Voltage calibration for an O2 Sensor applies at a constant temperature, and thus the sensors must maintain the temperature that corresponds to the calibration to ensure proper function.

Wiring Tab

Options

Number of Outputs

Select the Number of O2 Heaters to be controlled

Connections

Connection Type

Select an available output wire, typically a DPO (Digital Pulsed Output) that will be wired to your O2 Heater.

Active State

All DPOs switch to ground when they are active. Changing the Active State simply changes whether the output is normally On or it is normally Off. It does not change the output from being a ground to being a 12V+ supply.

O2 Heater Tab

Heater Frequency

The frequency of the PWM output that is controlling the O2 heater.

Related Tables

O2 Heater Duty Cycle

Under ECU Navigator > Lambda > O2 Control > Heater 1/2 Duty Cycle

This table controls the duty cycle for the output controlling the O2 heater. This is used to accurately control the temperature of the sensor under varying conditions - for example when under low load, the exhaust temperature is too cool to maintain the correct temperature for the O2 sensor. This table allows the user to supply more duty to the heater circuit under low exhaust temperature conditions and conversely less or even no duty under higher exhaust temperature conditions.

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