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Discussion Starter · #1 ·
I have a 2014 Lancer with 2.4L and purchased it with header and no converter, I have since added the converter and both 02 sensors back to it to pass emissions in Texas. I keep getting a front 02 sensor code. On the Autel I can look at live data but it doesn’t list sensor one just sensor 2 so I don’t see any readings. Should I be looking at something else or some guidance where to go on this. Thanks
 

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2018 MQ Triton
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Has the ECU been reprogrammed to have no sensors? If so you would need to program it back to standard, or replace the ECU or replace with a standalone ECU such as a HALTECH
 

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Discussion Starter · #3 ·
I wasn’t sure what had been done to the ecu before but I found the tuners business card in the car and he said he had the factory file for the car. Shipped it to him and flashed it back to factory.
 

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Discussion Starter · #4 ·
Not sure what voltages I should be seeing out of the 02 sensors. Of course I can only see sensor 2 one but at idle it reads 0v and when reving up maybe around 7v.
 

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2018 MQ Triton
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Both sensors should be between 0v and 1v. Front will be going up and down between these figures, and the rear one should be steady at 0.2 to 0.3 v at idle
 
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