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.
2001 Mazda Protege MP3FACTORY OEM SERVICE PROCEDURE
Engine Performance (1.6L) DTCS
ENGINE PERFORMANCE (1.6L) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | System Affected |
|---|---|
| P0031 | Front HO2S Heater Circuit Low |
| P0032 | Front HO2S Heater Circuit High |
| P0037 | Rear HO2S Heater Circuit Low |
| P0038 | Rear HO2S Heater Circuit High |
| P0102 | Mass Airflow (MAF) Sensor Circuit, Low Input |
| P0103 | Mass Airflow (MAF) Sensor Circuit, High Input |
| P0106 | BARO Circuit, Performance Problem |
| P0107 | BARO Circuit , Low Input |
| P0108 | BARO Circuit, High Input |
| P0111 | Intake Air Temperature (IAT) Sensor Circuit, Performance Problem |
| P0112 | Intake Air Temperature (IAT) Sensor Circuit, Low Input |
| P0113 | Intake Air Temperature (IAT) Sensor Circuit, High Input |
| P0117 | Engine Coolant Temperature (ECT) Sensor Circuit, Low Input |
| P0118 | Engine Coolant Temperature (ECT) Sensor Circuit, High Input |
| P0122 | Throttle Position (TP) Sensor Circuit, Low Input |
| P0123 | Throttle Position (TP) Sensor Circuit, High Input |
| P0125 | Insufficient Coolant Temperature For Closed Loop Fuel Control |
| P0130 | Front HO2S Circuit Malfunction |
| P0134 | Front HO2S Circuit, No Activity Detected |
| P0138 | Rear HO2S Circuit, High Input |
| P0140 | Rear HO2S Circuit, No Activity Detected |
| P0171 | Fuel Trim Too Lean |
| P0172 | Fuel Trim Too Rich |
| 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 |
| P0335 | Crankshaft Position (CKP) Sensor Circuit Malfunction |
| P0401 | EGR System, Insufficient Flow |
| P0402 | EGR System, Excessive Flow |
| P0421 | Catalyst System Efficiency Below Threshold |
| P0442 | EVAP Control System, Small Leak Detected |
| P0443 | EVAP Control System Purge Control Valve, Circuit Malfunction |
| P0451 | Fuel Tank Pressure Sensor, Performance Problem |
| P0452 | EVAP Control System Pressure Sensor, Low Input |
| P0453 | EVAP Control System Pressure Sensor, High Input |
| P0455 | EVAP Control System Malfunction, Excessive Leak Detected |
| P0461 | Fuel Gauge Sending Unit Circuit, Range/Performance Problem |
| P0462 | Fuel Gauge Sending Unit Circuit, Low Input |
| P0463 | Fuel Gauge Sending Unit Circuit, High Input |
| P0464 | Fuel Gauge Sending Unit Circuit, Slosh Check |
| P0480 | Cooling Fan Relay Circuit |
| P0500 | Vehicle Speed Sensor Malfunction |
| P0506 | Idle Control System, RPM Less Than Expected |
| P0507 | Idle Control System, RPM Greater Than Expected |
| P0550 | Power Steering Pressure Switch Circuit Malfunction |
| P0703 | Brake Switch Input Circuit Malfunction |
| P0704 | Clutch Switch Input Circuit Malfunction |
| P0705 | Neutral Switch Input Circuit Malfunction |
| P1102 | Mass Airflow (MAF) Sensor Inconsistent With Throttle Position Sensor, Less Than Expected |
| P1103 | Mass Airflow (MAF) Sensor Inconsistent With RPM, Greater Than Expected |
| P1122 | Throttle Position Stuck Closed, Low Input |
| P1123 | Throttle Position Stuck Open, High Input |
| P1170 | Front HO2S, No Inversion |
| P1250 | Pressure Regulator Control (PRC) Solenoid Valve Malfunction |
| P1345 | Camshaft Position (CMP) Sensor Circuit Malfunction |
| P1449 | Canister Drain Cut Valve (CDCV), Open Or Short |
| P1450 | EVAP Control System Malfunction, Excessive Vacuum |
| P1487 | EGR Boost Sensor Solenoid Valve Circuit Malfunction |
| P1496 | EGR Valve Solenoid Coil No. 1, Open Or Short |
| P1497 | EGR Valve Solenoid Coil No. 2, Open Or Short |
| P1498 | EGR Valve Solenoid Coil No. 3, Open Or Short |
| P1499 | EGR Valve Solenoid Coil No. 4, Open Or Short |
| P1504 | Idle Air Control (IAC) Valve Circuit Malfunction |
| P1512 | Variable Tumble Control System (VTCS), Stuck Closed |
| P1562 | PCM +BB Voltage Low |
| P1569 | Variable Tumble Control System (VTCS) Solenoid Valve Circuit, Low Input |
| P1570 | Variable Tumble Control System (VTCS) Solenoid Valve Circuit, High Input |
| P1631 | Generator Output Voltage Signal, No Electricity |
| P1632 | Battery Voltage Circuit Malfunction |
| P1633 | Battery Overcharge |
| P1634 | Generator Terminal "B" Circuit Open |
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.