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Lambda sensor

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Lambda sensor


Lambda sensor

None - No lambda sensor enabled in the system, a lot of features is not functioning without a wide band sensor, it is very advice able to have a sensor connected to the MaxxECU.

Internal wideband controller - A wideband sensor is wired to the MaxxECU. <-- preferable use this option, since the built-in wideband controller in MaxxECU is superior to anything on the market today.

narrowband sensor - Support for narrowband sensor (do not use this type of sensor...)

External wideband controller (AEM UEGO) -

External wideband controller (AEM X-series (30-0300)) -

External wideband controller (afm1000 std) -

External wideband controller (afm1000 B-version) -

External wideband controller (afm1000 C-version) -

External wideband controller (afm1000 D-version) -

External wideband controller (haltech methanol) -

External wideband controller (Innovate) -

External wideband controller (PLX) -

External wideband controller (techedge) -

External wideband controller (zeitronix) -

External CAN wideband controller (User defined) - Customize your own lambda CAN input, using the User CAN Input function, and set the destination to Lambda sensor bank X.

External CAN wideband controller (AEM X-series) -

External CAN wideband controller (exqbe dual wbo controller/CAN) - Discontinued product.

External CAN wideband controller (Motec LTC/LTCD)) -


Dual sensor mode

Single sensor - Mostly used on straight engines.

Two sensors, bank mode (V-engine) - Mostly used with MaxxECU PRO (which supports two wide band sensors using built-in controllers).

Note: The internal wide band controller and an external controller CAN NOT be used together, to get able to use the dual sensor mode, two external controllers must be used.


dual bank cylinder assignment


cylinder x 02 sensor

Specifies which sensor is mounted on which cylinder side. Bank A is always on the cylinder 1 side.



internal wideband sensor


sensor type

LSU 4.2 - default and recommended sensor.

LSU 4.9 - Not as sustainable as the LSU 4.2 sensor.


sensor warmup

ECU startup - Started right after ECU is started (fastest option to get accurate lambda readings fast (10-15seconds)).

Engine startup - Wide band sensor heating is started during cranking (mostly used in some Plugin solution where the LSU is powered from an external source like OEM fuel pump relay).

Note: The WBO error detection is also using this setting.


calibration mode

default automatic calibration - MaxxECU reads the built-in resistor from factory to be used as calibration data. <-- recommended usage.

manual free air calibration - Manual way of calibrating the connected sensor (s), if you for some reason (like using an old and worn sensor) want to manually calibrate the sensor (s), see below.



free air calibration


Used to calibrate lambda sensor. Normally not used. MaxxECU will calibrate sensor automatically (when default automatic calibration option above is used), but this can be used to calibrate and old and worn sensor.



Make sure the wide band sensor has not been exposed for exhaust gases the closest hour, have the sensor OUTSIDE of the exhaust and press the calibrate sensor button for the relevant sensor.






Internal wideband controller with an LSU 4.2 sensor

Note: Requires an wideband sensor wired to MaxxECU.


1. Activate the GPO 8 as a internal lambda sensor heater (sensor 1).




2. Activate the lambda sensor as internal wideband controller.




External wide band controller wired to AIN 3 (0-5V)


1. Inputs --> AIN (0-5V), select lambda sensor bank A on the relevant analog input (AIN) 0-5V channel your external wide band controller is wired to.




2. Inputs --> lambda sensor, select the external controller wired to the MaxxECU analog input. In the above example an Innovate LC-1 controller is used.




Dual wide band sensors wired to a MaxxECU PRO

Note: Requires two wideband sensors wired to MaxxECU.


1. Activate the wired lambda heater outputs, as the internal lambda heaters (internal lambda sensor heater (sensor 1/2)).




2. Enable the internal wideband controller, and the dual sensor mode as two sensors, bank mode (V-engine). Also set the sensor assignment to suit your engine.