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.
2000 Mazda Millenia Base, 2.5FACTORY OEM SERVICE PROCEDURE
Engine Performance (2.3L) DTCS
ENGINE PERFORMANCE (2.3L) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| P0100 | MASS AIRFLOW (MAF) SENSOR CIRCUIT MALFUNCTION |
| P0105 | MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR CIRCUIT MALFUNCTION |
| P0110 | INTAKE AIR TEMPERATURE (IAT) SENSOR CIRCUIT MALFUNCTION |
| P0115 | ENGINE COOLANT TEMPERATURE (ECT) SENSOR CIRCUIT MALFUNCTION |
| P0120 | THROTTLE POSITION (TP) SENSOR CIRCUIT MALFUNCTION |
| P0125 | EXCESSIVE TIME TO ENTER CLOSED LOOP |
| P0130 | RIGHT FRONT HEATED OXYGEN SENSOR MALFUNCTION |
| P0134 | RIGHT FRONT HEATED OXYGEN SENSOR, INSUFFICIENT ACTIVITY DETECTED |
| P0135 | RIGHT FRONT HEATED OXYGEN SENSOR HEATER MALFUNCTION |
| P0138 | RIGHT REAR HEATED OXYGEN SENSOR CIRCUIT HIGH VOLTAGE |
| P0140 | RIGHT REAR HEATED OXYGEN SENSOR, INSUFFICIENT ACTIVITY DETECTED |
| P0141 | RIGHT REAR HEATED OXYGEN SENSOR HEATER MALFUNCTION |
| P0150 | LEFT FRONT HEATED OXYGEN SENSOR MALFUNCTION |
| P0154 | LEFT FRONT HEATED OXYGEN SENSOR, INSUFFICIENT ACTIVITY DETECTED |
| P0155 | LEFT FRONT HEATED OXYGEN SENSOR HEATER MALFUNCTION |
| P0158 | LEFT REAR HEATED OXYGEN SENSOR CIRCUIT HIGH VOLTAGE |
| P0160 | LEFT REAR HEATED OXYGEN SENSOR, INSUFFICIENT ACTIVITY DETECTED |
| P0161 | LEFT REAR HEATED OXYGEN SENSOR HEATER MALFUNCTION |
| P0170 | BANK NO. 1, FUEL TRIM MALFUNCTION |
| P0173 | BANK NO. 2, FUEL TRIM MALFUNCTION |
| P0300 | RANDOM MISFIRE DETECTED |
| P0301 | CYLINDER NO. 1 MISFIRE DETECTED |
| P0302 | CYLINDER NO. 2 MISFIRE DETECTED |
| P0303 | CYLINDER NO. 3 MISFIRE DETECTED |
| P0304 | CYLINDER NO. 4 MISFIRE DETECTED |
| P0305 | CYLINDER NO. 5 MISFIRE DETECTED |
| P0306 | CYLINDER NO. 6 MISFIRE DETECTED |
| P0325 | KNOCK SENSOR NO. 1 CIRCUIT MALFUNCTION |
| P0335 | CRANKSHAFT POSITION SENSOR CIRCUIT MALFUNCTION |
| P0400 | EGR FLOW MALFUNCTION |
| P0404 | EGR RANGE/PERFORMANCE MALFUNCTION |
| P0421 | BANK NO. 1 RIGHT BANK WARM UP CATALYST SYSTEM EFFICIENCY BELOW LIMIT |
| P0431 | BANK NO. 2 RIGHT BANK WARM UP CATALYST SYSTEM EFFICIENCY BELOW LIMIT |
| P0442 | EVAP SYSTEM MALFUNCTION, LEAK DETECTED |
| P0443 | EVAP SYSTEM, PURGE CONTROL VALVE CIRCUIT MALFUNCTION |
| P0450 | EVAP SYSTEM PRESSURE SENSOR MALFUNCTION |
| P0455 | EVAP SYSTEM MALFUNCTION, EXCESSIVE LEAK DETECTED |
| P0464 | FUEL GAUGE SENDING UNIT CIRCUIT INTERMITTENT MALFUNCTION |
| P0500 | VEHICLE SPEED SENSOR (VSS) MALFUNCTION |
| P0510 | CLOSED THROTTLE POSITION SWITCH MALFUNCTION |
| P0550 | POWER STEERING SWITCH MALFUNCTION |
| P0703 | BRAKE SWITCH MALFUNCTION |
| P1110 | INTAKE AIR TEMPERATURE (IAT) SENSOR DYNAMIC CHAMBER, OPEN OR SHORT CIRCUIT |
| P1113 | INTAKE AIR TEMPERATURE (IAT) SENSOR LYSHOLM COMPRESSOR, OPEN OR SHORT CIRCUIT |
| P1170 | RIGHT FRONT HEATED OXYGEN SENSOR, INVERSION |
| P1173 | LEFT FRONT HEATED OXYGEN SENSOR, INVERSION |
| P1196 | STARTER SWITCH, OPEN OR SHORT CIRCUIT |
| P1250 | PRESSURE REGULATOR CONTROL (PRC) SOLENOID VALVE MALFUNCTION |
| P1345 | CAMSHAFT POSITION SENSOR, NO SGC SIGNAL |
| P1402 | EGR VALVE POSITION SENSOR, OPEN OR SHORT CIRCUIT |
| P1449 | CANISTER DRAIN CUT VALVE (CDCV), OPEN OR SHORT CIRCUIT |
| P1450 | EVAP SYSTEM, LEAK DOWN |
| P1455 | FUEL TANK LEVEL SENSOR, OPEN OR SHORT CIRCUIT |
| P1487 | MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR SOLENOID VALVE, OPEN OR SHORT CIRCUIT |
| P1508 | BY-PASS AIR SOLENOID VALVE, OPEN OR SHORT CIRCUIT |
| P1524 | CHARGE AIR COOLER BY-PASS SOLENOID VALVE, OPEN OR SHORT CIRCUIT |
| P1525 | AIR BY-PASS SOLENOID VALVE (VACUUM), OPEN OR SHORT CIRCUIT |
| P1526 | AIR BY-PASS SOLENOID VALVE (VENT), OPEN OR SHORT CIRCUIT |
| P1540 | AIR BY-PASS SYSTEM, OPEN OR SHORT CIRCUIT |
| P1601 | COMMUNICATION LINE ERROR (AUTOMATIC TRANSMISSION) |
| P1609 | POWERTRAIN CONTROL MODULE (PCM) MALFUNCTION |
| P1627 | POWERTRAIN CONTROL MODULE (PCM)/TRACTION CONTROL SYSTEM (TCS) LINE COMMUNICATION ERROR |
| P1628 | POWERTRAIN CONTROL MODULE (PCM)/TRACTION CONTROL SYSTEM (TCS) LINE COMMUNICATION ERROR |
| P1794 | BATTERY SUPPLY CIRCUIT MALFUNCTION |
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.