Download Mazda Protege MIL Illumination with P0171, P1170, Lack Of Power, Hesitation - REPAIR PROCEDURE 1. Verify customer concern. 2. Record DTC and Freeze Frame data. 3. Inspect intake system for vacuum leaks. 4. Identify production date on MAF sensor. – If MAF sensor has a production date before 07B27 (July 27, 2000), proceed to STEP 5. – If MAF sensor has a production date on or after 07B27 (July 27, 2000), this Service Bulletin does not apply. Refer to Workshop Manual for further diagnostic procedures. 5. Clean surface surrounding MAF sensor. 6. Replace MAF sensor. Note: Make sure 0-ring is correctly positioned on replacement MAF sensor before installation. Caution: ^ Do not allow water to enter MAF sensor connector. ^ Handle replacement MAF sensor with care. 7. Inspect air cleaner and correct any unfiltered air leaks: ^ Improperly positioned air cleaner element and/or deformed seal. ^ Broken tabs, cracks and/or deformities of the air cleaner. 8. Disconnect negative battery cable or pull INJ fuse to erase and reset KAM (Keep Alive Memory). 9. Verify repair.