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I've been doing some tuning on an 06 trailblazer SS with my hptuner, it seems to be randomly targeting 15.98 at cruise then will go back to 14.7. I'm unaware of any tables that can change target AFR at cruise. Any input would be greatly appreciated. It has been previously tuned with hp tuner.
Under the Diagnostics tab and 'Exhaust', disable the Post O2 Test and you should be good to go. The 15.98 commanded AFR is the PCM requesting a lean mixture to test for a faulty O2 sensor.
That is exactly the answer I was looking. Thanks Andre, you are the best!
