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.
1993 Mazda 929FACTORY OEM SERVICE PROCEDURE
Engine Controls - Tests W/Codes
- Introduction
- Self-Diagnostic System
- Trouble Code Identification
- Notes
- Trouble Code Identification Table
- Code 2: (Crankshaft Position Sensor - Ne2 Signal)
- Code 3: (Distributor G Signal)
- Code 4: (Distributor Ne1 Signal)
- Code 5 & 7: (Left/Right Knock Sensor)
- Code 6: (Speedometer Sensor)
- Code 8: (Airflow Meter)
- Code 9: (Coolant THERMOSENSOR)
- Code 10: (Intake Air THERMOSENSOR - Airflow Meter)
- Code 11: (Intake Air THERMOSENSOR - Dynamic Chamber)
- Code 12: (Throttle Sensor)
- Code 14: (Atmospheric Pressure)
- Code 15 & 23: (Left/Right Side Oxygen Sensor)
- Code 16: (EGR Position Sensor)
- Code 17 & 24: (Left/Right Side Feedback System)
- Code 26: (Purge Control Solenoid Valve)
- Code 28: (EGR Vacuum Solenoid Valve)
- Code 29: (EGR Vent Solenoid Valve)
- Code 30: (Cold Start Injector Relay)
- Code 34: (Idle Speed Control)
- Code 36 & 37: (Right/Left Oxygen Sensor Heater Relay)
- Code 41: (Variable Resistance Induction System)
- Code 65: (A/C Input Signal)
- Summary
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.
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