Narrowband O2 Sensor(s)

Narrowband O2 Sensor(s)

Narrowband O2 Sensor

A Narrowband O2 sensor can be used by the ECU for monitoring purposes, or for closed-loop O2 Control. A narrowband sensor by definition measures only a narrow section of the AFR scale. It is designed to allow the AFR to be oscillated around stoic (approx. 14.7:1 AFR-Petrol) to improve exhaust catalytic converters to operate more efficiently. Narrowband O2 sensors are not ideal for engine tuning other than for emissions purposes. A Wideband O2 Sensor is a more suitable choice for that application.

Note: Your ECU can accept up to 2 individual Narrowband O2 inputs. This article is appropriate for all Narrowband sensors.



This node sets the upper voltage limit for any gauges that are displaying the Narrowband O2 voltage.

Diagnostics



Minimum Value - When enabled, and the Narrowband O2 Voltage drops below this amount, a corresponding DTC is flagged. DTC Severity sets the level of severity triggered by the DTC.
Maximum Value - When enabled, and the Narrowband O2 Voltage exceeds this amount, a corresponding DTC is flagged. DTC Severity sets the level of severity triggered by the DTC.

Wiring



This node allows you to assign the input for the Narrowband O2 sensor. 
Narrowband O2 Sensors use an Analog Input. Any available AVI can be used.
It is recommended to disable the Pull Up.


    • Related Articles

    • Narrowband O2 Target Voltage

      O2 Control Target Voltage Page When Narrowband O2 control is selected the number inputted in this table controls the target voltage for closed-loop operation.
    • Closed Loop Target Pressure

      Only available when Boost Control Mode is set to Closed Loop. ​ This table sets the boost pressure that the tuner would like to reach. The axes are user configurable and up to 4D mapping is available. For this example, a Haltech Trim Module is used ...
    • Base - Closed Loop

      In Closed loop mode, the ECU can make adjustments to the idle control motor duty based on RPM feedback. This table should still be set so that the amount of Base Output results in your actual engine RPM matching your Target RPM. However, when it is ...
    • Boost Control Closed Loop Base Duty Cycle

      Only available is Boost Control Mode is set to Closed Loop. ​ Due to there being more than one target value, the boost control solenoid needs to be pulsed at a different duty for different boost levels. This is achieved by giving the ECU a starting ...
    • Closed vs Open Loop Boost Control

      While using a simple mechanical boost tap (Open Loop Control) is a very popular boost control method, using Closed Loop boost control will offer more boost lower in the rev range, and therefore more useable power in the RPM ranges that get used most ...