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August 5, 2020 Service bulletin

If you receive a customer concern about the CHECK IN light coming on and DTC P3400 (cylinder deactivation...

Mazda technical service bulletin SA-061-20 for 2019 Mazda MAZDA3, 2018-2019 Mazda CX-5 and 2018 Mazda MAZDA6.

Bulletin number
SA-061-20
Component
Engine and engine cooling
Summary
If you receive a customer concern about the CHECK IN light coming on and DTC P3400 (cylinder deactivation system malfunction) stored, perform the inspection in the Repair Procedure.

Owners of these vehicles have filed 366 complaints in the engine category.

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