The following is a list of codes that I have come across in my time spent searching the Internet. If you have one that should be added post or PM it and I'll update the list. This list is for the 2.3L Mazda motor, I'm not sure if all of them apply to the MS6 2.3L or not but I've had one myself, P2006, and it is on the list so I thought I'd share it with the rest of the members.
P0011 CMP timing over-advanced ON 2 CCM
P0012 CMP timing over-retarded ON 2 CCM
P0031 Front HO2S heater circuit low input ON 2 O2 sensor heater
P0032 Front HO2S heater circuit high input ON 2 O2 sensor heater
P0037 Rear HO2S heater circuit low input ON 2 O2 sensor heater
P0038 Rear HO2S heater circuit high input ON 2 O2 sensor heater
P0101 MAF sensor inconsistent with TP sensor or engine speed ON 2 CCM
P0102 MAF circuit low input ON 1 CCM
P0103 MAF circuit high input ON 1 CCM
P0106 MAP sensor performance problem ON 2 CCM
P0107 MAP sensor circuit low input ON 1 CCM
P0108 MAP sensor circuit high input ON 1 CCM
P0111 IAT circuit performance problem ON 2 CCM
P0112 IAT circuit low input ON 1 CCM
P0113 IAT circuit high input ON 1 CCM
P0117 ECT circuit low input ON 1 CCM
P0118 ECT circuit high input ON 1 CCM
P0122 TP sensor No.1 circuit low input ON 1 CCM
P0123 TP sensor No.1 circuit high input ON 1 CCM
P0125 Excessive time to enter closed loop fuel control ON 2 CCM
P0126 Coolant thermostat stuck open ON 2 Thermostat
P0128 Coolant thermostat stuck open ON 2 Thermostat
P0131 Front HO2S (stuck low) ON 2 CCM
P0132 Front HO2S (stuck high) ON 2 CCM
P0133 Front HO2S circuit malfunction ON 2 O2 sensor
P0134 Front HO2S circuit no activity detected ON 2 CCM
P0137 Rear HO2S circuit low input ON 2 CCM
P0138 Rear HO2S circuit high input ON 2 CCM
P0140 Rear HO2S circuit no activity detected ON 2 CCM
P0171 Fuel trim system too lean ON 2 Fuel
P0172 Fuel trim system too rich ON 2 Fuel
P0222 TP sensor No.2 circuit low input ON 1 CCM
P0223 TP sensor No.2 circuit high input ON 1 CCM
P0300 Random misfire detected Flash / ON 1 or 2 Misfire
P0301 Cylinder No.1 misfire detected Flash / ON 1 or 2 Misfire
P0302 Cylinder No.2 misfire detected Flash / ON 1 or 2 Misfire
P0303 Cylinder No.3 misfire detected Flash / ON 1 or 2 Misfire
P0304 Cylinder No.4 misfire detected Flash / ON 1 or 2 Misfire
P0327 Knock sensor circuit low input ON 1 CCM
P0328 Knock sensor circuit high input ON 1 CCM
P0335 CKP sensor circuit malfunction ON 1 CCM
P0340 CMP sensor circuit malfunction ON 1 CCM
P0401 EGR flow insufficient detected ON 2 EGR
P0402 EGR flow excessive detected ON 2 EGR
P0403 EGR valve (stepper motor) circuit malfunction ON 2 CCM
P0420 Catalyst system efficiency below threshold ON 2 Catalyst
P0441 Evaporative emission control system incorrect purge flow ON 2 Evaporative
P0442 Evaporative emission control system leak detected (small leak) ON 2 Evaporative
P0443 Evaporative emission system purge control valve circuit malfunction ON 2 CCM
P0446 Change over valve (COV) (EVAP system leak pump) stuck close ON 2 Evaporative
P0455 Evaporative emission system leak detected (gross leak) ON 2 Evaporative
P0456 Evaporative emission system leak detected (very small leak) ON 2 Evaporative
P0461 Fuel gauge sender unit circuit range/performance ON 2 CCM
P0462 Fuel gauge sender unit circuit low input ON 2 CCM
P0463 Fuel gauge sender unit circuit high input ON 2 CCM
P0480 Fan relay No.1 control circuit malfunction OFF 2 Other
P0481 Fan relay No.2 and No.3 control circuit malfunction OFF 2 Other
P0482 Fan relay No.4 control circuit malfunction OFF 2 Other
P0500 Vehicle speed sensor (VSS) circuit malfunction ON 2 CCM
P0505 Idle control system malfunction OFF
P0506 Idle control system RPM lower than expected ON 2 CCM
P0507 Idle control system RPM higher than expected ON 2 CCM
P0550 PSP switch circuit malfunction ON 2 CCM
P0564 Cruise control switch circuit malfunction OFF 1 Other
P0571 Brake switch circuit malfunction OFF 1 Other
P0601 Internal control module memory check sum error ON 1 CCM
P0602 PCM programming error ON 1 CCM
P0604 PCM RAM error ON 1 CCM
P0606 ECM/PCM processor ON 1 CCM
P0607 Control module performance ON 1 CCM
P0610 Control module vehicle options error ON 1 CCM
P0638 Throttle actuator control range/performance ON 1 CCM
P0661 Variable intake-air system control solenoid valve circuit low input OFF 2 Other
P0662 Variable intake-air system control solenoid valve circuit high input OFF 2 Other
P0703 Brake switch No.1 circuit malfunction ON 2 CCM
P0704 Clutch switch circuit malfunction ON 2 CCM
P0850 Neutral switch circuit malfunction ON 2 CCM
P1410 VAD control system circuit malfunction OFF 2 Other
P1562 PCM +BB voltage low ON 1 CCM
P2004 Variable tumble control system (VTCS) shutter valve stuck open ON 2 CCM
P2006 Variable tumble control system (VTCS) shutter valve stuck closed ON 2 CCM
P2009 Variable tumble control solenoid valve circuit low input ON 2 CCM
P2010 Variable tumble control solenoid valve circuit high input ON 2 CCM
P2088 CMP actuator circuit low ON 2 CCM
P2089 CMP actuator circuit high ON 2 CCM
P2097 Post Catalyst Fuel Trim System Too Rich
P2100 Throttle actuator circuit open ON 1 CCM
P2101 Throttle actuator circuit range/performance ON 1 CCM
P2102 Throttle actuator circuit low input ON 1 CCM
P2103 Throttle actuator control motor circuit high input ON 1 CCM
P2107 Throttle actuator control module processor ON 1 CCM
P2108 Throttle actuator control module performance ON 1 or 2 CCM
P2119 Throttle actuator control throttle body range/performance ON 2 CCM
P2122 Accelerator pedal position (APP) sensor No.1 circuit low input ON 1 CCM
P2123 Accelerator pedal position (APP) sensor No.1 circuit high input ON 1 CCM
P2127 Accelerator pedal position (APP) sensor No.2 circuit low input ON 1 CCM
P2128 Accelerator pedal position (APP) sensor No.2 circuit high input ON 1 CCM
P2135 Throttle position sensor No.1/No.2 voltage correlation ON 1 CCM
P2138 Accelerator pedal position (APP) sensor No.1/No.2 voltage correlation ON 1 CCM
P2177 System too lean at idle, bank 1
P2187 System too lean at idle, bank 2
P2228 BARO sensor circuit low input ON 1 CCM
P2229 BARO sensor circuit high input ON 1 CCM
P2401 Evaporative emission system leak detection pump control circuit low ON 2 Other
P2402 Evaporative emission system leak detection pump control circuit high ON 2 Other
P2404 Evaporative emission system leak detection pump sense circuit malfunction ON 2 Other
P2405 Evaporative emission system leak detection pump sense circuit low input ON 2 Other
P2406 Evaporative emission system leak detection pump sense circuit high input ON 2 Other
P2407 Evaporative emission system leak detection pump sense circuit intermittent ON - Other
P2502 Generator terminal B circuit open OFF 1 Other
P2503 Generator output voltage signal no electricity OFF 1 Other
P2504 Battery overcharge OFF 1 Other
P0011 CMP timing over-advanced ON 2 CCM
P0012 CMP timing over-retarded ON 2 CCM
P0031 Front HO2S heater circuit low input ON 2 O2 sensor heater
P0032 Front HO2S heater circuit high input ON 2 O2 sensor heater
P0037 Rear HO2S heater circuit low input ON 2 O2 sensor heater
P0038 Rear HO2S heater circuit high input ON 2 O2 sensor heater
P0101 MAF sensor inconsistent with TP sensor or engine speed ON 2 CCM
P0102 MAF circuit low input ON 1 CCM
P0103 MAF circuit high input ON 1 CCM
P0106 MAP sensor performance problem ON 2 CCM
P0107 MAP sensor circuit low input ON 1 CCM
P0108 MAP sensor circuit high input ON 1 CCM
P0111 IAT circuit performance problem ON 2 CCM
P0112 IAT circuit low input ON 1 CCM
P0113 IAT circuit high input ON 1 CCM
P0117 ECT circuit low input ON 1 CCM
P0118 ECT circuit high input ON 1 CCM
P0122 TP sensor No.1 circuit low input ON 1 CCM
P0123 TP sensor No.1 circuit high input ON 1 CCM
P0125 Excessive time to enter closed loop fuel control ON 2 CCM
P0126 Coolant thermostat stuck open ON 2 Thermostat
P0128 Coolant thermostat stuck open ON 2 Thermostat
P0131 Front HO2S (stuck low) ON 2 CCM
P0132 Front HO2S (stuck high) ON 2 CCM
P0133 Front HO2S circuit malfunction ON 2 O2 sensor
P0134 Front HO2S circuit no activity detected ON 2 CCM
P0137 Rear HO2S circuit low input ON 2 CCM
P0138 Rear HO2S circuit high input ON 2 CCM
P0140 Rear HO2S circuit no activity detected ON 2 CCM
P0171 Fuel trim system too lean ON 2 Fuel
P0172 Fuel trim system too rich ON 2 Fuel
P0222 TP sensor No.2 circuit low input ON 1 CCM
P0223 TP sensor No.2 circuit high input ON 1 CCM
P0300 Random misfire detected Flash / ON 1 or 2 Misfire
P0301 Cylinder No.1 misfire detected Flash / ON 1 or 2 Misfire
P0302 Cylinder No.2 misfire detected Flash / ON 1 or 2 Misfire
P0303 Cylinder No.3 misfire detected Flash / ON 1 or 2 Misfire
P0304 Cylinder No.4 misfire detected Flash / ON 1 or 2 Misfire
P0327 Knock sensor circuit low input ON 1 CCM
P0328 Knock sensor circuit high input ON 1 CCM
P0335 CKP sensor circuit malfunction ON 1 CCM
P0340 CMP sensor circuit malfunction ON 1 CCM
P0401 EGR flow insufficient detected ON 2 EGR
P0402 EGR flow excessive detected ON 2 EGR
P0403 EGR valve (stepper motor) circuit malfunction ON 2 CCM
P0420 Catalyst system efficiency below threshold ON 2 Catalyst
P0441 Evaporative emission control system incorrect purge flow ON 2 Evaporative
P0442 Evaporative emission control system leak detected (small leak) ON 2 Evaporative
P0443 Evaporative emission system purge control valve circuit malfunction ON 2 CCM
P0446 Change over valve (COV) (EVAP system leak pump) stuck close ON 2 Evaporative
P0455 Evaporative emission system leak detected (gross leak) ON 2 Evaporative
P0456 Evaporative emission system leak detected (very small leak) ON 2 Evaporative
P0461 Fuel gauge sender unit circuit range/performance ON 2 CCM
P0462 Fuel gauge sender unit circuit low input ON 2 CCM
P0463 Fuel gauge sender unit circuit high input ON 2 CCM
P0480 Fan relay No.1 control circuit malfunction OFF 2 Other
P0481 Fan relay No.2 and No.3 control circuit malfunction OFF 2 Other
P0482 Fan relay No.4 control circuit malfunction OFF 2 Other
P0500 Vehicle speed sensor (VSS) circuit malfunction ON 2 CCM
P0505 Idle control system malfunction OFF
P0506 Idle control system RPM lower than expected ON 2 CCM
P0507 Idle control system RPM higher than expected ON 2 CCM
P0550 PSP switch circuit malfunction ON 2 CCM
P0564 Cruise control switch circuit malfunction OFF 1 Other
P0571 Brake switch circuit malfunction OFF 1 Other
P0601 Internal control module memory check sum error ON 1 CCM
P0602 PCM programming error ON 1 CCM
P0604 PCM RAM error ON 1 CCM
P0606 ECM/PCM processor ON 1 CCM
P0607 Control module performance ON 1 CCM
P0610 Control module vehicle options error ON 1 CCM
P0638 Throttle actuator control range/performance ON 1 CCM
P0661 Variable intake-air system control solenoid valve circuit low input OFF 2 Other
P0662 Variable intake-air system control solenoid valve circuit high input OFF 2 Other
P0703 Brake switch No.1 circuit malfunction ON 2 CCM
P0704 Clutch switch circuit malfunction ON 2 CCM
P0850 Neutral switch circuit malfunction ON 2 CCM
P1410 VAD control system circuit malfunction OFF 2 Other
P1562 PCM +BB voltage low ON 1 CCM
P2004 Variable tumble control system (VTCS) shutter valve stuck open ON 2 CCM
P2006 Variable tumble control system (VTCS) shutter valve stuck closed ON 2 CCM
P2009 Variable tumble control solenoid valve circuit low input ON 2 CCM
P2010 Variable tumble control solenoid valve circuit high input ON 2 CCM
P2088 CMP actuator circuit low ON 2 CCM
P2089 CMP actuator circuit high ON 2 CCM
P2097 Post Catalyst Fuel Trim System Too Rich
P2100 Throttle actuator circuit open ON 1 CCM
P2101 Throttle actuator circuit range/performance ON 1 CCM
P2102 Throttle actuator circuit low input ON 1 CCM
P2103 Throttle actuator control motor circuit high input ON 1 CCM
P2107 Throttle actuator control module processor ON 1 CCM
P2108 Throttle actuator control module performance ON 1 or 2 CCM
P2119 Throttle actuator control throttle body range/performance ON 2 CCM
P2122 Accelerator pedal position (APP) sensor No.1 circuit low input ON 1 CCM
P2123 Accelerator pedal position (APP) sensor No.1 circuit high input ON 1 CCM
P2127 Accelerator pedal position (APP) sensor No.2 circuit low input ON 1 CCM
P2128 Accelerator pedal position (APP) sensor No.2 circuit high input ON 1 CCM
P2135 Throttle position sensor No.1/No.2 voltage correlation ON 1 CCM
P2138 Accelerator pedal position (APP) sensor No.1/No.2 voltage correlation ON 1 CCM
P2177 System too lean at idle, bank 1
P2187 System too lean at idle, bank 2
P2228 BARO sensor circuit low input ON 1 CCM
P2229 BARO sensor circuit high input ON 1 CCM
P2401 Evaporative emission system leak detection pump control circuit low ON 2 Other
P2402 Evaporative emission system leak detection pump control circuit high ON 2 Other
P2404 Evaporative emission system leak detection pump sense circuit malfunction ON 2 Other
P2405 Evaporative emission system leak detection pump sense circuit low input ON 2 Other
P2406 Evaporative emission system leak detection pump sense circuit high input ON 2 Other
P2407 Evaporative emission system leak detection pump sense circuit intermittent ON - Other
P2502 Generator terminal B circuit open OFF 1 Other
P2503 Generator output voltage signal no electricity OFF 1 Other
P2504 Battery overcharge OFF 1 Other
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