| Mazda engine codes |
| 2 |
Crank Angle Sensor (NE Signal) |
| 3 |
Crank Angle Sensor (G Signal) |
| 5 |
Knock Signal |
| 6 |
Speedometer Signal |
| 9 |
Water Temp Sensor |
| 11 |
Intake Air Temp Sensor |
| 12 |
Throttle Angle Sensor |
| 13 |
Pressure Sensor |
| 14 |
Atmospheric Sensor |
| 15 |
O2 Sensor |
| 16 |
EGR Switch |
| 17 |
Feedback System |
| 18 |
Throttle Sensor (Narrow Range) |
| 20, 26, 27 & 37 |
Metering Oil Pump Position Sensor |
| 23 |
Fuel Thermosensor |
| 25 |
Solenoid Valve (Pressure Regulator Control) |
| 28 |
Solenoid Valve (EGR) |
| 30 |
Solenoid Valve (Split Air Bypass) |
| 31 |
Solenoid Valve (Relief 1) |
| 32 |
Solenoid Valve (Switching) |
| 33 |
Solenoid Valve (Port Air Bypass) |
| 34 |
Solenoid Valve (Idle Speed Control) |
| 38 |
Solenoid Valve (Acceleration Warm Up System) |
| 39 |
Solenoid Valve (Relief 2) |
| 40 |
Solenoid Valve (Purge control) |
| 42 |
Solenoid Valve (Turbo Pre Control) |
| 43 |
Solenoid Valve (Wastegate Control) |
| 44 |
Solenoid Valve (Turbo Control) |
| 45 |
Solenoid Valve (Charge Control) |
| 46 |
Solenoid Valve (Charge Relief) |
| 50 |
Solenoid Valve (Double Throttle Control) |
| 51 |
Fuel Pump Relay |
| 54 |
Air Pump Relay |
| 71, 73 |
Injector |
| 76 |
Slip Lock Up Off Signal |
| 77 |
Torque Reduced Signal |
| Some trouble codes are not listed for certain models and some codes apply to only California cars. |
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Most Mazdas require locating the diagnostic plug beneath the hood and jumping the required pins. Reading the code is just like reading a code from a Honda. Before pulling any codes, make sure the vehicle is in the "OFF" position. The vehicle we tested was a '95 RX-7 but most late-model Mazdas require jumping the same pins in the diagnostic plug. Most Mazdas will apply to this sequence but to be certain check your service manual. Our RX-7 required jumping the "TEN" pin and ground (GND) and placing the car in the "ON" position. Codes are signified through the check engine light on the dash and new codes begin within 4 seconds from the last code.
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