I think you may need a longer run, in my testing however on a different engine, it takes a while for the rear lambda sensor error to show if it’s not there, also I think it needs 2 or 3 cycles to trigger an EMLYes!
- I disconnected the NOx/Lambda Sensor from the NOx Controller and started the engine, no error code!
- I then disconnected the NOx Controller and started the engine, no error code!
- A 5 minute test run did not trigger any error codes either. Otherwise I did not notice any different in the engine behavior.
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