Engine Flares Up Or Slips When Upshifting Or Downshifting (Us): Notes

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.

ENGINE FLARES UP, SLIPS WHEN UPSHIFTING, DOWNSHIFTING (ET6A-EL, ET6AX-EL, US) DESCRIPTION AND POSSIBLE CAUSE

Troubleshooting item	Engine flares up or slips when upshifting or downshifting
Description	When shifting up while accelerating the vehicle with the accelerator pedal depressed, the engine revs. When shifting down while the vehicle is being driven normally with the accelerator pedal depressed, the engine revs rapidly.
Possible cause	Insufficient TCM learning Signal malfunction APP sensor malfunction CKP sensor malfunction MAF sensor malfunction
System wiring diagram	Not applicable
Connector diagram	Not applicable