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 LX, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/CODES
1991 Mazda MX-6 LX, Automatic
Engine Controls - Tests W/Codes
1991 Mazda MX-6 LX, AutomaticSECTION Engine Controls - Tests W/Codes
- Self-Diagnostic System Introduction
- Retrieving Codes
- Clearing Codes
- Summary
- Trouble Code Identification Chart (Non-Turbo)
- Notes
- Trouble Code Identification Table (Non-Turbo)
- Code 1: Ignition Pulse
- Code 8: Airflow Sensor
- Code 9: Coolant THERMOSENSOR
- Code 10: Intake Air THERMOSENSOR
- Code 12: Throttle Sensor
- Code 14: Atmospheric Pressure Sensor
- Code 15: Oxygen Sensor
- Code 16: EGR Position Sensor (CALIF)
- Code 17: Feedback System
- Code 25: Pressure Regulator Solenoid Valve
- Code 26: Purge Solenoid Valve
- Code 28: EGR Solenoid Valve
- Code 34: Idle Speed Control (ISC)
- Trouble Code Identification Chart (Turbo)
- Notes
- Trouble Code Identification Table (Turbo)
- Code 1: Ignition Pulse
- Code 2: Ne Signal-Distributor
- Code 3: G1 Signal-Distributor
- Code 4: G2 Signal-Distributor
- Code 5: Knock Sensor & Knock Control Unit
- Code 8: Airflow Sensor
- Code 9: Coolant THERMOSENSOR
- Code 10: Intake Air THERMOSENSOR
- Code 12: Throttle Sensor
- Code 14: Atmospheric Pressure Sensor
- Code 15: Oxygen Sensor
- Code 16: EGR Position Sensor
- Code 17: Feedback System
- Code 25: Pressure Regulator Solenoid Valve
- Code 26: Purge Solenoid Valve
- Code 28: EGR Vacuum Solenoid Valve
- Code 29: EGR Vent Solenoid Valve
- Code 34: Idle Speed Control (ISC)
- Code 42: WASTEGATE Solenoid Valve
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- β’ You smell fuel, burning insulation, or see smoke.
- β’ Brakes feel soft, pull hard to one side, or make grinding noises.
- β’ The engine overheats, stalls repeatedly, or misfires under load.
- β’ You are missing required tools, torque specs, or safe lifting equipment.
- β’ You are not confident in the next step or safety outcome.