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2016 WRX STI
34 Posts
Discussion Starter · #1 · (Edited)
Hello, after installing the AEM Wideband Sensor with iWire Plug and Play Wiring Kit my 2016 STI is throwing P0138 and P0037 codes. I followed all instructions as seen in this video:

I have double-checked everything and it all seems to be correct. Is this possible tune related?

Anything helps, thanks.
Edit: Was doing some more research. I have the grimspeed high flow catted down pipe (the old version). Not sure if this is relevant.
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