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.
1994 Mazda MX-5 Miata Base, AutomaticFACTORY OEM SERVICE PROCEDURE
Trouble Code Identification Table
TROUBLE CODE IDENTIFICATION
| DTC | Description |
|---|---|
| CODE 1 | Ignition Signal |
| CODE 3 | SGT Signal - Crank Angle |
| CODE 4 | SGC Signal - Crank Angle |
| CODE 8 | Airflow Meter |
| 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 Function Sensor - CKT Diagram |
| CODE 17 | Feedback System |
| CODE 25 | PRC Solenoid Valve |
| CODE 26 | Purge Control Solenoid Valve |
| CODE 28 | EGR Vacuum Solenoid Valve |
| CODE 29 | EGR Vent Solenoid Valve |
| CODE 34 | Idle Speed Control |
Factory Service Tools
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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.