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 MANUALSMAZDA1991MX-6 L4-2184CC 2.2L SOHC TURBO F2REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDESCRIPTION AND OPERATIONFEEDBACK SYSTEM
1991 Mazda MX-6 L4-2184cc 2.2L SOHC Turbo F2
Feedback System
1991 Mazda MX-6 L4-2184cc 2.2L SOHC Turbo F2SECTION Feedback System
System Description:
The Feedback System monitors air/fuel ratio by means of the voltage signal from the oxygen sensor. Various problems in addition to a defective oxygen sensor can cause the ECU to detect a malfunction in this system and set a trouble code. Some of these problems include:
^ Air leak in vacuum hoses or emission component
^ Contaminated oxygen sensor
^ Fuel injection system faulty
^ Ignition system misfire
^ Wiring harness open or short circuit
^ ECU faulty
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.