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Fiesta ST MK7 2014 error code P2188 & P132B from BOV or tune?

RegularAO

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Im getting these error codes:

P132B - Turbocharger/Supercharger Boost Control A Performance, signal amplitude too low

P2188 - System too rich at idle bank1

Car has slightly unstable idle but performs well and has normal fuel economy.

Can this be caused just by a sensor being confused by blow off valve installed by previos owner? Or maybe some tune? Or is it most likely mechanical failiure?

Thank you!
 




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