Here is a list of Mazda 3.0L CEL Codes that I found on the Internet, stickied for your veiwing pleasure.
P0011 CMP timing over-advanced (RH) ON 1 CCM
P0012 CMP timing over-retarded (RH) ON 1 CCM
P0021 CMP timing over-advanced (LH) ON 1 CCM
P0022 CMP timing over-retarded (LH) ON 1 CCM
P0031 HO2S heater (RF) circuit low ON 2 O2 sensor heater
P0032 HO2S heater (RF) circuit high ON 2 O2 sensor heater
P0037 HO2S heater (RR) circuit low ON 2 O2 sensor heater
P0038 HO2S heater (RR) circuit high ON 2 O2 sensor heater
P0051 HO2S heater (LF) circuit low ON 2 O2 sensor heater
P0052 HO2S heater (LF) circuit high ON 2 O2 sensor heater
P0057 HO2S heater (LR) circuit low ON 2 O2 sensor heater
P0058 HO2S heater (LR) circuit high ON 2 O2 sensor heater
P0101 MAF sensor inconsistent with TP sensor ON 2 CCM
P0102 MAF circuit low input ON 1 CCM
P0103 MAF 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 ON 2 Thermostat
P0128 Coolant thermostat ON 2 Thermostat
P0131 HO2S (RF) no inversion (low stuck) ON 2 CCM
P0132 HO2S (RF) no inversion (high stuck) ON 2 CCM
P0133 HO2S (RF) circuit malfunction ON 2 O2 sensor
P0134 HO2S (RF) circuit no activity detected ON 2 CCM
P0138 HO2S (RR) circuit high input ON 2 CCM
P0140 HO2S (RR) circuit no activity detected ON 2 CCM
P0151 HO2S (LF) no inversion (low stuck) ON 2 CCM
P0152 HO2S (LF) no inversion (high stuck) ON 2 CCM
P0153 HO2S (LF) circuit malfunction ON 2 O2 sensor
P0154 HO2S (LF) circuit no activity detected ON 2 CCM
P0158 HO2S (LR) circuit high input ON 2 CCM
P0160 HO2S (LR) circuit no activity detected ON 2 CCM
P0171 Fuel trim system (RH) too lean ON 2 Fuel
P0172 Fuel trim system (RH) too rich ON 2 Fuel
P0174 Fuel trim system (LH) too lean ON 2 Fuel
P0175 Fuel trim system (LH) 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.4 misfire detected Flash / ON 1 or 2 Misfire
P0303 Cylinder No.2 misfire detected Flash / ON 1 or 2 Misfire
P0304 Cylinder No.5 misfire detected Flash / ON 1 or 2 Misfire
P0305 Cylinder No.3 misfire detected Flash / ON 1 or 2 Misfire
P0306 Cylinder No.6 misfire detected Flash / ON 1 or 2 Misfire
P0325 KS circuit ON 1 CCM
P0335 CKP sensor circuit malfunction ON 1 CCM
P0340 CMP sensor (RH) circuit malfunction ON 1 CCM
P0345 CMP sensor (LH) 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
P0421 Warm-up catalyst system (RH) efficiency below threshold ON 2 Catalyst
P0431 Warm-up catalyst system (LH) efficiency below threshold ON 2 Catalyst
P0441 EVAP control system incorrect purge flow ON 2 Evaporative
P0442 EVAP control system leak detected (small leak) ON 2 Evaporative
P0443 EVAP control system purge control valve circuit malfunction ON 2 CCM
P0446 Change over valve (EVAP leak detection pump) stuck close ON 2 Evaporative
P0455 EVAP control system leak detected (large leak) ON 2 Evaporative
P0456 EVAP control 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 control circuit malfunction OFF 2 Other
P0500 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
P0602 PCM programming error ON 1 CCM
P0606 ECM/PCM processor OFF 1 Other
P0610 Control module vehicle options error ON 1 CCM
P0703 Brake switch No.1 input malfunction ON 2 CCM
P0704 Clutch switch input malfunction ON 2 CCM
P0850 Neutral switch input malfunction ON 2 CCM
P1309 PCM IC for misfire detection ON 2 CCM
P1410 VAD control system circuit malfunction OFF 2 Other
P1487 EGR boost sensor solenoid valve circuit malfunction ON 2 CCM
P1562 PCM +BB voltage low ON 1 CCM
P2088 CMP actuator (RH) circuit low ON 1 CCM
P2089 CMP actuator (RH) circuit high ON 1 CCM
P2092 CMP actuator (LH) circuit low ON 1 CCM
P2093 CMP actuator (LH) circuit high ON 1 CCM
P2100 Throttle actuator control motor circuit/open ON 1 CCM
P2101 Throttle actuator control motor circuit range/performance ON 1 CCM
P2105 Throttle actuator control system - forced engine shutdown OFF 1 Other
P2107 Throttle actuator control module processor ON 1 CCM
P2110 Throttle actuator control system - forced limited RPM ON 1 CCM
P2111 Throttle actuator control system - stuck open ON 1 CCM
P2112 Throttle actuator control system - stuck close ON 1 CCM
P2119 Throttle actuator control throttle body range/performance ON 2 CCM
P2122 APP sensor No.1 circuit low input ON 1 CCM
P2123 APP sensor No.1 circuit high input ON 1 CCM
P2127 APP sensor No.2 circuit low input ON 1 CCM
P2128 APP sensor No.2 circuit high input ON 1 CCM
P2135 TP sensor No.1/No.2 voltage correlation ON 1 CCM
P2138 APP sensor No.1/No.2 voltage correlation ON 1 CCM
P2227 EGR boost sensor circuit performance problem ON 2 CCM
P2228 EGR boost sensor circuit low input ON 1 CCM
P2229 EGR boost sensor circuit high input ON 1 CCM
P2401 EVAP system leak detection pump control circuit low ON 2 Evaporative
P2402 EVAP system leak detection pump control circuit high ON 2 Evaporative
P2404 EVAP system leak detection pump sense circuit malfunction ON 2 Evaporative
P2405 EVAP system leak detection pump sense circuit low input ON 2 Evaporative
P2406 EVAP system leak detection pump sense circuit high input ON 2 Evaporative
P2407 EVAP system leak detection pump sense circuit intermittent ON 2 Evaporative
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
U0073 CAN system communication error
U0121 Communication error to ABS/TCS HU/CM
P0011 CMP timing over-advanced (RH) ON 1 CCM
P0012 CMP timing over-retarded (RH) ON 1 CCM
P0021 CMP timing over-advanced (LH) ON 1 CCM
P0022 CMP timing over-retarded (LH) ON 1 CCM
P0031 HO2S heater (RF) circuit low ON 2 O2 sensor heater
P0032 HO2S heater (RF) circuit high ON 2 O2 sensor heater
P0037 HO2S heater (RR) circuit low ON 2 O2 sensor heater
P0038 HO2S heater (RR) circuit high ON 2 O2 sensor heater
P0051 HO2S heater (LF) circuit low ON 2 O2 sensor heater
P0052 HO2S heater (LF) circuit high ON 2 O2 sensor heater
P0057 HO2S heater (LR) circuit low ON 2 O2 sensor heater
P0058 HO2S heater (LR) circuit high ON 2 O2 sensor heater
P0101 MAF sensor inconsistent with TP sensor ON 2 CCM
P0102 MAF circuit low input ON 1 CCM
P0103 MAF 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 ON 2 Thermostat
P0128 Coolant thermostat ON 2 Thermostat
P0131 HO2S (RF) no inversion (low stuck) ON 2 CCM
P0132 HO2S (RF) no inversion (high stuck) ON 2 CCM
P0133 HO2S (RF) circuit malfunction ON 2 O2 sensor
P0134 HO2S (RF) circuit no activity detected ON 2 CCM
P0138 HO2S (RR) circuit high input ON 2 CCM
P0140 HO2S (RR) circuit no activity detected ON 2 CCM
P0151 HO2S (LF) no inversion (low stuck) ON 2 CCM
P0152 HO2S (LF) no inversion (high stuck) ON 2 CCM
P0153 HO2S (LF) circuit malfunction ON 2 O2 sensor
P0154 HO2S (LF) circuit no activity detected ON 2 CCM
P0158 HO2S (LR) circuit high input ON 2 CCM
P0160 HO2S (LR) circuit no activity detected ON 2 CCM
P0171 Fuel trim system (RH) too lean ON 2 Fuel
P0172 Fuel trim system (RH) too rich ON 2 Fuel
P0174 Fuel trim system (LH) too lean ON 2 Fuel
P0175 Fuel trim system (LH) 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.4 misfire detected Flash / ON 1 or 2 Misfire
P0303 Cylinder No.2 misfire detected Flash / ON 1 or 2 Misfire
P0304 Cylinder No.5 misfire detected Flash / ON 1 or 2 Misfire
P0305 Cylinder No.3 misfire detected Flash / ON 1 or 2 Misfire
P0306 Cylinder No.6 misfire detected Flash / ON 1 or 2 Misfire
P0325 KS circuit ON 1 CCM
P0335 CKP sensor circuit malfunction ON 1 CCM
P0340 CMP sensor (RH) circuit malfunction ON 1 CCM
P0345 CMP sensor (LH) 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
P0421 Warm-up catalyst system (RH) efficiency below threshold ON 2 Catalyst
P0431 Warm-up catalyst system (LH) efficiency below threshold ON 2 Catalyst
P0441 EVAP control system incorrect purge flow ON 2 Evaporative
P0442 EVAP control system leak detected (small leak) ON 2 Evaporative
P0443 EVAP control system purge control valve circuit malfunction ON 2 CCM
P0446 Change over valve (EVAP leak detection pump) stuck close ON 2 Evaporative
P0455 EVAP control system leak detected (large leak) ON 2 Evaporative
P0456 EVAP control 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 control circuit malfunction OFF 2 Other
P0500 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
P0602 PCM programming error ON 1 CCM
P0606 ECM/PCM processor OFF 1 Other
P0610 Control module vehicle options error ON 1 CCM
P0703 Brake switch No.1 input malfunction ON 2 CCM
P0704 Clutch switch input malfunction ON 2 CCM
P0850 Neutral switch input malfunction ON 2 CCM
P1309 PCM IC for misfire detection ON 2 CCM
P1410 VAD control system circuit malfunction OFF 2 Other
P1487 EGR boost sensor solenoid valve circuit malfunction ON 2 CCM
P1562 PCM +BB voltage low ON 1 CCM
P2088 CMP actuator (RH) circuit low ON 1 CCM
P2089 CMP actuator (RH) circuit high ON 1 CCM
P2092 CMP actuator (LH) circuit low ON 1 CCM
P2093 CMP actuator (LH) circuit high ON 1 CCM
P2100 Throttle actuator control motor circuit/open ON 1 CCM
P2101 Throttle actuator control motor circuit range/performance ON 1 CCM
P2105 Throttle actuator control system - forced engine shutdown OFF 1 Other
P2107 Throttle actuator control module processor ON 1 CCM
P2110 Throttle actuator control system - forced limited RPM ON 1 CCM
P2111 Throttle actuator control system - stuck open ON 1 CCM
P2112 Throttle actuator control system - stuck close ON 1 CCM
P2119 Throttle actuator control throttle body range/performance ON 2 CCM
P2122 APP sensor No.1 circuit low input ON 1 CCM
P2123 APP sensor No.1 circuit high input ON 1 CCM
P2127 APP sensor No.2 circuit low input ON 1 CCM
P2128 APP sensor No.2 circuit high input ON 1 CCM
P2135 TP sensor No.1/No.2 voltage correlation ON 1 CCM
P2138 APP sensor No.1/No.2 voltage correlation ON 1 CCM
P2227 EGR boost sensor circuit performance problem ON 2 CCM
P2228 EGR boost sensor circuit low input ON 1 CCM
P2229 EGR boost sensor circuit high input ON 1 CCM
P2401 EVAP system leak detection pump control circuit low ON 2 Evaporative
P2402 EVAP system leak detection pump control circuit high ON 2 Evaporative
P2404 EVAP system leak detection pump sense circuit malfunction ON 2 Evaporative
P2405 EVAP system leak detection pump sense circuit low input ON 2 Evaporative
P2406 EVAP system leak detection pump sense circuit high input ON 2 Evaporative
P2407 EVAP system leak detection pump sense circuit intermittent ON 2 Evaporative
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
U0073 CAN system communication error
U0121 Communication error to ABS/TCS HU/CM
