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.
2003 Mazda 6 s, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Performance (3.0L) DTCS
ENGINE PERFORMANCE (3.0L) DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| P0011 | CMP Timing (Right Side) - Over-Advanced |
| P0012 | CMP Timing (Right Side) - Over-Retarded |
| P0021 | CMP Timing (Left Side) - Over-Advanced |
| P0022 | CMP Timing (Left Side) - Over-Retarded |
| P0031 | HO2S Heater (Right Front) Circuit - Low Input |
| P0032 | HO2S Heater (Right Front) Circuit - High Input |
| P0037 | HO2S Heater (Right Rear) Circuit - Low Input |
| P0038 | HO2S Heater (Right Rear) Circuit - High Input |
| P0051 | Left Front HO2S Heater Circuit - Low Input |
| P0052 | Left Front HO2S Heater Circuit - High Input |
| P0057 | Left Rear HO2S Heater Circuit - Low Input |
| P0058 | Left Rear HO2S Heater Circuit - High Input |
| P0101 | Mass Airflow/Intake Air Temperature Sensor Inconsistent With Throttle Position Sensor |
| P0102 | Mass Airflow Circuit - Low Input |
| P0103 | Mass Airflow Circuit - High Input |
| P0111 | Intake Air Temperature Circuit Performance Problem |
| P0112 | Intake Air Temperature Circuit - Low Input |
| P0113 | Intake Air Temperature Circuit - High Input |
| P0117 | Engine Coolant Temperature Circuit - Low Input |
| P0118 | Engine Coolant Temperature Circuit - High Input |
| P0122 | Throttle Position Sensor No. 1 - Low Input |
| P0123 | Throttle Position Sensor No. 1 - High Input |
| P0125 | Excessive Time To Enter Closed Loop Fuel Control |
| P0126 | Coolant Thermostat - Stuck Open |
| P0128 | Coolant Thermostat - Stuck Open |
| P0131 | Right Front HO2S No Inversion - Stuck Low |
| P0132 | Right Front HO2S No Inversion - Stuck High |
| P0133 | Right Front HO2S Circuit - Malfunction |
| P0134 | Right Front HO2S Circuit - No Activity Detected |
| P0138 | Right Rear HO2S Circuit - High Input |
| P0140 | Right Rear HO2S Circuit - No Activity Detected |
| P0151 | Left Front HO2S No Inversion - Stuck Low |
| P0152 | Left Front HO2S No Inversion - Stuck High |
| P0153 | Left Front HO2S Circuit - Malfunction |
| P0154 | Left Front HO2S Circuit - No Activity Detected |
| P0158 | Left Rear HO2S Circuit - High Input |
| P0160 | Left Rear HO2S Circuit - No Activity Detected |
| P0171 | Right Side Fuel Trim System - Too Lean |
| P0172 | Right Side Fuel Trim System - Too Rich |
| P0174 | Left Side Fuel Trim System - Too Lean |
| P0175 | Left Side Fuel Trim System - Too Rich |
| P0222 | Throttle Position Sensor No. 2 Circuit - Low Input |
| P0223 | Throttle Position Sensor No. 2 Circuit - High Input |
| 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 Circuit - Malfunction |
| P0335 | Crankshaft Position Sensor Circuit - Malfunction |
| P0340 | Right Side Camshaft Position Sensor Circuit - Malfunction |
| P0345 | Left Side Camshaft Position Sensor Circuit - Malfunction |
| P0401 | EGR Flow - Insufficient Detected |
| P0402 | EGR Flow - Excessive Detected |
| P0403 | EGR Valve Control Circuit - Malfunction |
| P0421 | Right Side Warm-Up Catalyst System Efficiency Below Threshold |
| P0431 | Left Side Warm-Up Catalyst System Efficiency Below Threshold |
| P0441 | EVAP Control System - Incorrect Purge Flow |
| P0442 | EVAP Control System Small Leak |
| P0443 | Evaporative Emission Control System Purge Solenoid Valve Circuit - Malfunction |
| P0446 | Change Over Valve (EVAP System Leak Detection Pump) Stuck Closed |
| P0455 | EVAP Control System - Large Leak Detected |
| P0456 | EVAP Control System - Very Small Leak Detected |
| P0461 | Fuel Gauge Sender Unit Circuit Range/Performance Problem |
| P0462 | Fuel Gauge Sender Unit Circuit - Low Input |
| P0463 | Fuel Gauge Sender Unit Circuit - High Input |
| P0480 | Fan Control Circuit - Malfunction |
| P0500 | Vehicle Speed Sensor Circuit - Malfunction |
| P0505 | Idle Control System - Malfunction |
| P0506 | Idle Control System RPM - Less Than Expected |
| P0507 | Idle Control System RPM - More Than Expected |
| P0550 | Power Steering Pressure Switch Circuit - Malfunction |
| P0564 | Cruise Control Switch Circuit - Malfunction |
| P0571 | Brake Switch Circuit - Malfunction |
| P0602 | Power Control Module Programming Error |
| P0606 | Engine Control Module/Power Control Module Processor |
| P0610 | Control Module - Vehicle Options Error |
| P0703 | Brake Switch No. 1 - Input Malfunction |
| P0704 | Clutch Switch - Input Malfunction |
| P0850 | Neutral Switch - Input Malfunction |
| P1309 | PCM Integrated Circuit For Misfire Detection |
| P1410 | PCM Integrated Circuit For Misfire Detection |
| P1487 | EGR Boost Sensor Solenoid Valve Circuit - Malfunction |
| P1562 | PCM Positive Back-Up Battery Voltage - Low Input |
| P2088 | Right Oil Control Valve Actuator Circuit - Low Input |
| P2089 | Right Oil Control Valve Actuator Circuit - High Input |
| P2092 | Left Oil Control Valve Actuator Circuit - Low Input |
| P2093 | Left Oil Control Valve Actuator Circuit - High Input |
| P2100 | Throttle Actuator Control Motor Circuit/Open |
| P2101 | Throttle Actuator Control Motor Circuit Range/Performance |
| P2105 | Throttle Actuator Control System - Forced Engine Shutdown |
| P2107 | Throttle Actuator Control Module Processor |
| P2110 | Throttle Actuator Control System - Forced Limited RPM |
| P2111 | Throttle Actuator Control System - Stuck Open |
| P2112 | Throttle Actuator Control System - Stuck Closed |
| P2119 | Throttle Actuator Control Throttle Body Range/Performance |
| P2122 | Accelerator Pedal Position Sensor No. 1 Circuit - Low Input |
| P2123 | Accelerator Pedal Position Sensor No. 1 Circuit - High Input |
| P2127 | Accelerator Pedal Position Sensor No. 2 Circuit - Low Input |
| P2128 | Accelerator Pedal Position Sensor No. 2 Circuit - High Input |
| P2135 | Throttle Position Sensor No. 1/No. 2 - Voltage Correlation |
| P2138 | Accelerator Pedal Position Sensor No. 1/No. 2 - Voltage Correlation |
| P2227 | EGR Boost Sensor Circuit - Performance Problem |
| P2228 | EGR Boost Sensor Circuit - Low Input |
| P2229 | EGR Boost Sensor Circuit - High Input |
| P2401 | EVAP System Leak Detection Pump Control Circuit - Low Input |
| P2402 | EVAP System Leak Detection Pump Control Circuit - High Input |
| P2404 | EVAP System Leak Detection Pump Sense Circuit - Malfunction |
| P2405 | EVAP System Leak Detection Pump Sense Circuit - Low Input |
| P2406 | EVAP System Leak Detection Pump Sense Circuit - High Input |
| P2407 | EVAP System Leak Detection Pump Sense Circuit - Intermittent |
| P2502 | Generator Terminal "B" Circuit Open |
| P2503 | Generator Output Voltage Signal - No Electricity |
| P2504 | Battery - Overcharge |
| U0073 | CAN System - Communication Error |
| U0100 | TCM Cannot Receive Any Signals From PCM |
| U0121 | Communication Error to ABS/TCS HU/CM |
| U0155 | Communication Error To Instrument Cluster |
| U1900 | CAN System Communication Error |
| U2516 | CAN System Wiring Harness Open Or Short |
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.
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