Inspecting Mazda Airbox Filter

Oct. 23, 2023
Some Mazda vehicles (2012-2013 Mazda3 SKYACTIV, 2014-2023 Mazda3, 2014-2021 Mazda6, 2016-2019 CX-3, 2013-2023 CX-5, 2016 CX-9, and 2016-2022 MX-5) may experience a check engine light on with DTC P0171 (fuel trim too lean) and possibly P030X (misfire).

Some Mazda vehicles (2012-2013 Mazda3 SKYACTIV, 2014-2023 Mazda3, 2014-2021 Mazda6, 2016-2019 CX-3, 2013-2023 CX-5, 2016 CX-9, and 2016-2022 MX-5) may experience a check engine light on with DTC P0171 (fuel trim too lean) and possibly P030X (misfire).

Inspect the airbox/air filter for proper fitment. Inspect the MAF for correct operation. Inspect the A/F sensor for correct operation and inspect the fuel trims during normal engine idle.

If fuel trims are normal after the aforementioned inspections/repairs, the repair is complete. If fuel trims are abnormal, replace the fuel injectors and verify that the fuel trims have been corrected. Note: P0171 will be set while the engine is idling or if the vehicle is driven and the fuel feedback correction amount reaches the upper limit (25% or more) for 20 seconds or more.

Sponsored Recommendations

Snap-on Training: ADAS Level 2 - Component Testing

The second video for Snap-on's comprehensive overview of Advanced Driver Assistance Systems (ADAS), covering the fundamental concepts and functionalities essential for automotive...

Snap-on Training: Intro to ADAS

Snap-on's training video provides a comprehensive overview of Advanced Driver Assistance Systems (ADAS), covering the fundamental concepts and functionalities essential for automotive...

Snap-on Training: Guided Component Tests Level 2

The second video for Snap-on's comprehensive overview of Guided Component Tests, covering the fundamental concepts essential for diagnostic procedures.

Snap-on Training: Data Bus Testing and Diagnosis Part 1

Learn the basics of vehicle data buses and their diagnosis with Snap-on's Jason Gabrenas.

Voice Your Opinion!

To join the conversation, and become an exclusive member of Vehicle Service Pros, create an account today!