Cookey09 Posted July 6, 2019 Share Posted July 6, 2019 Hi all. Having the Milltek GPF Delete and GPF back exhaust installed on my mk8 fiesta ST, the dash is throwing up the engine warning light... i've been told this is due to the lambda sensors and the car thinking the GPF unit is still there. Does anyone have any experience or advice in this case? Also been told that the revo stage1 remap should irradicate the Engine Warning Light. Thanks, Cookey. Quote Link to comment Share on other sites More sharing options...
Big al smyth Posted October 5, 2019 Share Posted October 5, 2019 Hi mate i have same problem .light came on last night.did you get it fixed? Quote Link to comment Share on other sites More sharing options...
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