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Mazda fault codes: probable meanings

Codes specific to Mazda (often P1xxx, B1xxx, C1xxx, U1xxx). The manufacturer does not publish these meanings: they come from an open database and remain probable. The same code can have another meaning depending on the model or the year.

Codes: 233, from smallest to largest.

CodeProbable meaning
P1000OBD II Monitor Testing Not Completed
P1001Unable to Achieve Self-Test Function Or SCP Error
P1100Mass Air Flow Sensor Circuit Intermittent
P1101Mass Air Flow Sensor Circuit Out Of Self-Test Range
P1102Mass Air Flow Sensor Signal Inconsistent With Throttle Position Sensor
P1103Mass Air Flow Sensor Signal Inconsistent With Engine Speed
P1110Intake Air Temperature Sensor Signal Dynamic Chamber Circuit
P1112Intake Air Temperature Sensor Circuit Intermittent
P1113Intake Air Temperature Sensor Signal Dynamic Chamber Circuit
P1114Intake Air Temperature Sensor Circuit Low Input
P1116ECT Sensor Circuit Out Of Self Test Range
P1117ECT Sensor Signal Intermittent
P1120Throttle Position Sensor Out Of Range Low
P1121Throttle Position Sensor Signal Not Consistent With Mass Air Flow Signal
P1122Throttle Position Stuck Closed
P1123Throttle Position Stuck Open
P1124Throttle Position Sensor Signal Out Of Self Test Range
P1125Throttle Position Sensor Signal Intermittent
P1126Throttle Position Narrow Range Sensor Circuit
P1127HO2S Bank 1 Sensor 2 Heater Not On During Key On Engine Running Self Test
P1128HO2S Bank 1 Sensor 1 Signals Swapped In Key On Engine Running Self Test
P1129Downstream H02S Sensors Swapped
P1130HO2S Bank 1 Sensor 1 Not Switching Fuel Control Limit Reached
P1131HO2S Bank 1 Sensor 1 Signal Below 0.45v AF Ratio Too Lean
P1132HO2S Bank 1 Sensor 1 Signal Above 0.45v AF Ratio Too Rich
P1133Bank 1 Fuel Control Shifted Lean
P1134Bank 1 Fuel Control Shifted Rich
P1135HO2S Bank 1 Sensor 1 Heater Circuit Low Input
P1136HO2S Bank 1 Sensor 1 Heater Circuit High Input
P1137HO2S Bank 1 Sensor 2 Not Switching Fuel Control Limit Reached
P1138HO2S Bank 1 Sensor 2 Signal Above 0.45v AF Ratio Too Rich
P1141HO2S Bank 1 Sensor 2 Heater Circuit Low Input
P1142HO2S Bank 1 Sensor 2 Heater Circuit High Input
P1143HO2S Bank 1 Sensor 3 Signal Below 0.45v AF Ratio Too Lean
P1144HO2S Bank 1 Sensor 3 Signal Above 0.45v AF Ratio Too Rich
P1150HO2S Bank 2 Sensor 1 Not Switching Fuel Control Limit Reached
P1151HO2S Bank 2 Sensor 1 Signal Below 0.45v AF Ratio Too Lean
P1152HO2S Bank 2 Sensor 1 Signal Above 0.45v AF Ratio Too Rich
P1153Bank 2 Fuel Control Shifted Lean FAOSC
P1154Bank 2 Fuel Control Shifted Rich FAOSC
P1169HO2S Bank 1 Sensor 1 Circuit Fixed Bank 1 Sensor 1
P1170HO2S Bank 1 Sensor 1 Circuit Fixed Bank 1 Sensor 1
P1173HO2S Bank 2 Sensor 1 Circuit Fixed Bank 2 Sensor 1
P1182Fuel Shut Off Solenoid Circuit
P1189Pump Speed Signal
P1190Calibration Resistor Out Of Range
P1191TP Controlled Circuit
P1194ECM PCM A D Converter
P1195EGR Boost Sensor Circuit
P1196Ignition Switch Start Circuit
P1197Mileage Switch Circuit
P1213Start Injector Circuit
P1221Traction Control System
P1222Traction Control Output Circuit
P1226Control Sleeve Sensor Circuit
P1235Fuel Pump Control Circuit
P1236Fuel Pump Control Out Range
P1248Turbo Boost Pressure Not Detected
P1250Pressure Regulator Control Solenoid Circuit
P1251Air Mixture Solenoid Circuit
P1252Pressure Regulator Control Solenoid 2 Circuit Malfunction
P1260Anti-Theft System Signal Detected Engine Disabled
P1270Engine RPM or Vehicle Speed Limit Reached
P1279Control Sleeve Sensor Circuit Range Performance
P1298Injector Driver Module Failure
P1309Misfire Detection Monitor
P1312Injection Pump Timing Actuator Circuit
P1318Injection Timing Piston Position Sensor Circuit
P1319Injection Timing Piston Position Sensor Circuit Range Performance
P1345No CMP or SGC Signal
P1351Ignition Diagnostic Monitor Signal Lost To PCM Or Out Of Range
P1352Ignition Coil A Primary Circuit
P1353Ignition Coil B Primary Circuit
P1354Ignition Coil C Primary Circuit
P1358Ignition Diagnostic Monitor Signal Out Of Self Test Range
P1359SPOUT Signal Lost To Powertrain Control Module Or Out Of Range
P1360Ignition Coil A Secondary Circuit
P1361Ignition Coil B Secondary Circuit
P1362Ignition Coil C Secondary Circuit
P1364Ignition Coil Primary Circuit
P1365Ignition Coil Secondary Circuit
P1382Camshaft Position Timing Solenoid 1 Circuit
P1387Camshaft Position Timing Solenoid 2 Circuit
P1390Octane Adjust Shorting Bar Out Or Circuit Open
P1400DPFE Sensor Circuit Low Input
P1401DPFE Sensor Circuit High Input
P1402EGR Valve Position Sensor Circuit
P1405DPFE Sensor Upstream Hose Off Or Plugged
P1406DPFE Sensor Downstream Hose Off Or Plugged
P1407No EGR Flow Detected
P1408EGR System Flow Out Of Key On Engine Running Self Test Range
P1409EGR Vacuum Regulator Solenoid Circuit
P1410EGR Boost Solenoid Valve Stuck
P1412Exhaust Gas Recirculation Valve Frozen
P1415Air Pump Circuit
P1416Port Air Circuit
P1417Port Air Relief Circuit
P1418Split Air 1 Circuit
P1419Split Air 2 Circuit
P1439Floor Temp Switch Circuit
P1443EVAP System Purge Flow Fault
P1444EVAP Purge Flow Sensor Circuit Low Voltage
P1445EVAP Purge Flow Sensor Circuit High Voltage
P1446Evaporative Vacuum Solenoid Circuit
P1449Evaporative Check Solenoid Circuit
P1450Unable To Bleed Up Fuel Tank Vacuum
P1451Canister Vent Solenoid Circuit
P1455Fuel Tank Level Sensor Circuit
P1456Fuel Tank Temperature Sensor Circuit
P1457Purge Solenoid Control System
P1458A/C Compressor Clutch Signal Fault
P1475Fan Relay Low Circuit
P1476Fan Relay High Circuit
P1508Idle Air Control Circuit Open
P1509Idle Air Control Circuit Shorted
P1514High Load Neutral Drive Fault
P1516Gear Change Neutral Drive Fault
P1517Cranking Neutral Drive Fault
P1534Restraint Deployment Indicator Circuit
P1562Powertrain Control Module +B Voltage Low
P1566TCM B+ Voltage Low
P1569IMRC Circuit Low
P1570IMRC Circuit High
P1600Loss Of KAM Power Circuit Open
P1601Powertrain Control Module Communication Line To TCM Error
P1602Powertrain Control Module Communication Line To TCM Error, Immobilizer System Communication Error With Powertrain Control Module
P1603Immobilizer System Fault
P1604Immobilizer System Fault
P1605Powertrain Control Module Keep Alive Memory Test Error
P1608Powertrain Control Module ECM CPU DTC Test Fault
P1609Powertrain Control Module ECM CPU Knock Sensor Circuit
P1621Immobilizer System Fault
P1622Immobilizer System Fault
P1623Immobilizer System Fault
P1624Immobilizer System Fault
P1627Powertrain Control Module ECM TCS Line Communication Error
P1628Powertrain Control Module ECM TCS Any Line Communication Error
P1630Alternator Regulator 1 Control Circuit
P1631Generator Output Voltage Signal No Output
P1632Battery Voltage Detection Circuit for Alternator Regulator
P1633Battery Overcharge Fault
P1634Generator Terminal B Circuit Open
P1645Fuel Pump Resistor Switch Circuit
P1649Fuel Injection Pump Module
P1650Power Steering Pressure Switch Out Of Range Fault
P1651Power Steering Pressure Switch Circuit
P1652Power Steering Pressure Switch Circuit
P1680Metering Oil Pump Failure
P1682Metering Oil Pump Failure
P1683Metering Oil Pump Temperature Sensor Circuit
P1684Metering Oil Pump Position Sensor Circuit
P1685Metering Oil Pump Stepping Motor Cont Circuit
P1686Metering Oil Pump Stepping Motor Cont Circuit
P1687Metering Oil Pump Stepping Motor Cont Circuit
P1688Metering Oil Pump Stepping Motor Cont Circuit
P1689Oil Pressure Control Solenoid Circuit
P1690Wastegate Solenoid Circuit
P1691Turbo Pressure Control Solenoid Circuit
P1692Turbo Control Solenoid Circuit
P1693Turbo Charge Control Circuit
P1694Turbo Charge Relief Circuit
P1701Transmission Range Sensor Reverse Engagement Error
P1702Transmission Range Sensor Circuit Intermittent
P1703Brake On Off Switch Out Of Self Test Range
P1705Transmission Range Sensor Out Of Self Test Range
P1706High Vehicle Speed Observed In Park
P1708Clutch Switch Circuit
P1709Clutch Pedal Position Switch Circuit
P1710Transmission Control Module Solenoid Internal Ground Circuit
P1711Transmission Fluid Temperature Sensor Circuit Out Of Self Test Range
P1713Transmission Fluid Temperature Sensor Circuit
P1714Shift Solenoid 1 Mechanical Fault
P1715Shift Solenoid 2 Mechanical Fault
P1716Shift Solenoid 3 Mechanical Fault
P1717Shift Solenoid 4 Mechanical Fault
P1718Transmission Fluid Temperature Sensor Circuit
P1719Engine Torque Signal
P1720Vehicle Speed Sensor 2 Signal Error
P1721Gear 1 Incorrect Ratio
P1722Gear 2 Incorrect Ratio
P1723Gear 3 Incorrect Ratio
P1724Gear 4 Incorrect Ratio
P1729Transmission 4x4 Low Switch Error
P1735First Gear Switch Circuit Failure
P1736Second Gear Switch Circuit Failure
P1737Lockup Solenoid
P1738Shift Time Error
P1739Slip Solenoid
P1740Torque Converter Clutch Solenoid Mechanical Fault
P1741Torque Converter Clutch Control Electrical Fault
P1742Torque Converter Clutch Solenoid Shorted
P1743Torque Converter Clutch Failed On TCIL Is On
P1744Torque Converter Clutch Solenoid Mechanical Fault
P1745Line Pressure Solenoid
P1746Electronic Pressure Control Solenoid Circuit Open
P1747Electronic Pressure Control Solenoid Circuit
P1748Pressure Control Solenoid A
P1749Electronic Pressure Control Solenoid Circuit Low
P1751Transmission Shift Solenoid A Mechanical Fault
P1752Transmission Shift Solenoid A Circuit Shorted
P1754Transmission Coast Clutch Solenoid Electrical Fault
P1756Transmission Shift Solenoid B Mechanical Fault
P1757Transmission Shift Solenoid B Circuit Shorted
P17592-4 Brake Failsafe Valve Malfunction
P1761Transmission Shift Solenoid 3 Mechanical Fault
P1762Transmission SS3 SS4 OD Band Fault
P1763Low And Reverse Brake Pressure Switch Circuit
P1764Low And Reverse Brake Failsafe Valve Malfunction
P1765Transmission 3-2 Timing Solenoid Valve
P1767Torque Converter Clutch Solenoid Circuit
P1770Clutch Solenoid Circuit
P1771Throttle Position Sensor Circuit Open To Transmission Control Module
P1772Throttle Position Sensor Circuit Shorted To Transmission Control Module
P1775Torque Down Signal 1 Circuit
P1776Torque Down Signal 2 Circuit
P1777Torque Down Response Signal Circuit
P1780Transmission Control Switch Circuit, Overdrive Off Switch Not Cycled During The Self Test
P1781Transmission 4x4 Low Switch Out Of Range Fault
P1783Transmission Fluid Temperature High Input
P1788Pressure Control Solenoid B Circuit Open
P1789Pressure Control Solenoid B Circuit Shorted
P1790TP Mechanical Circuit
P1791TP Electric Circuit
P1792Barometer Pressure Circuit
P1793Intake Air Volume Circuit
P1794Powertrain Control Module Battery Direct Power Circuit
P1795Idle Switch Circuit
P1796Kick Down Switch Circuit
P1797P/N Switch Open Or Short Circuit
P1798Coolant Temperature Circuit
P1799Hold Switch Circuit
P1900Turbine Speed Sensor Circuit Intermittent
P1901Torque Converter Clutch Circuit Intermittent

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Official meanings: OBDex (public domain, CC0). Manufacturer codes: dtc-database (MIT license), probable meanings not verified by the manufacturers. The same meaning can vary depending on the model: always have a diagnosis confirmed by a professional.