Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSMAZDA1999PROTEGE LX L4-1.6L DOHCREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTFUEL DELIVERY AND AIR INDUCTIONTECHNICAL SERVICE BULLETINSCUSTOMER INTERESTENGINE CONTROLS - MIL ON/DRIVEABILITY CONCERNS
1999 Mazda Protege LX L4-1.6L DOHC
Engine Controls - MIL ON/Driveability Concerns
1999 Mazda Protege LX L4-1.6L DOHCSECTION Engine Controls - MIL ON/Driveability Concerns
Bulletin No: 01-018/01
Last Issued: 11/1/2001
Subject:
MIL ILLUMINATION WITH P0171, P1170, LACK OF POWER, HESITATION
APPLICABLE MODEL(S)/VINs
All 1999-2000 Protege 1.6L with VINs lower than JM1 BJ222* *0 300996.
DESCRIPTION
Some vehicles may exhibit MIL illumination with any of the following symptoms: DTC P0171, DTC P1170, Lack of power, Hesitation, Unstable idle. These conditions may be caused by contamination of the mass air flow sensor wires.
Customers having this concern should have their vehicle repaired using the following procedure.
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.
PART(S) INFORMATION
WARRANTY INFORMATION
Note:
This information applies to verified customer complaints on vehicles covered under normal warranty. Refer to the SRT microfiche for warranty term information.
DISCLAIMER
Last Issued: 11/1/2001
Subject:
MIL ILLUMINATION WITH P0171, P1170, LACK OF POWER, HESITATION
APPLICABLE MODEL(S)/VINs
All 1999-2000 Protege 1.6L with VINs lower than JM1 BJ222* *0 300996.
DESCRIPTION
Some vehicles may exhibit MIL illumination with any of the following symptoms: DTC P0171, DTC P1170, Lack of power, Hesitation, Unstable idle. These conditions may be caused by contamination of the mass air flow sensor wires.
Customers having this concern should have their vehicle repaired using the following procedure.
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.
PART(S) INFORMATION
WARRANTY INFORMATION
Note:
This information applies to verified customer complaints on vehicles covered under normal warranty. Refer to the SRT microfiche for warranty term information.
DISCLAIMER
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.