Mazda Check Engine Light Codes

Welcome to the Mazda Check Engine Light codes page. Below you will find the most complete list of Mazda trouble codes available. The code definitions are a good starting point when determining the cause of the service engine light but where do you go from there? We have a large number of resources to help you repair the problem. Here is how we suggest you proceed. Look up your code definition. This tells you where to start testing. If you are unsure of any abbreviations, check out the acronym list by clicking on the link at the left.

Next, read our article Automotive Circuit Testing 101, and if there is an article related to the system you are testing, such as Oxygen Sensors or EGR concerns, read these as well. They will provide valuable info! If there is a link to a specific diagnosis strategy for the code then follow that and start testing. If there is no procedure for your manufacturer specific code, then I suggest referring to a similar generic OBD II code (these are listed numerically by system type) to get a good idea of what to look for. If at this point you still need assistance use the "Get Help" link and let us know how we can help. We can provide information on component location, specifications, circuit color/location and more. We do ask that you please read the info available on the site first so that we can help reduce repeat questions. So please read our Disclaimer and when you're ready jump in!

Also we value your feedback and like to hear stories of unusual fixes or concerns you may have run into with your Check Engine Light, so feel free to share your experiences by using the "Contact Us" link. Let's go!

We do our best to update these Mazda check engine light codes as frequently as possible. If you find one missing let us know and we we'll add it immediately! Please use the form on our Contact Page to get in touch with us. We certainly understand how frustrating it can be to look for a code definition and have it not online when you need it. And lets face it, if the service engine light is on then you need it now! It's easiest to use the "Find On This Page" feature of your browser's "Edit" menu to find codes on this page as the list is quite long. These are listed in numerical order for easy searching.

When retrieving Mazda check engine light codes with an OBD II scan tool, proceed as follows:
1. Connect scan tool to the 16-pin data link connector (DLC) located underneath the steering column. The connector may have a removable cover.
2. Turn the ignition on.
3. Follow scan tool manufacturer's operating instructions to access the Diagnostic Trouble Codes (DTC's).

Remember, these are manufacturer specific codes only. Refer to our Generic OBD II code list for definitions on all other Mazda diagnostic trouble codes.

Manufacturer Specific Codes
P1000 OBD II Monitor Testing Not Completed

P1001 Unable to Achieve Self-Test Function Or SCP Error

P1100 Mass Air Flow Sensor Circuit Intermittent - Read Our Article On Automotive Circuit Testing For Help With This Mazda Check Engine Light Code

P1101 Mass Air Flow Sensor Circuit Out Of Self-Test Range

P1102 Mass Air Flow Sensor Signal Inconsistent With Throttle Position Sensor

P1103 Mass Air Flow Sensor Signal Inconsistent With Engine Speed

P1110 Intake Air Temperature Sensor Signal (Dynamic Chamber) Circuit - Read Our Article On Automotive Circuit Testing For Help With This Mazda Check Engine Light Code

P1112 Intake Air Temperature Sensor Circuit Intermittent - Read Our Article On Automotive Circuit Testing For Help With This Mazda Check Engine Light Code

P1113 Intake Air Temperature Sensor Signal (Dynamic Chamber) Circuit - Read Our Article On Automotive Circuit Testing For Help With This Mazda Check Engine Light Code

P1114 Intake Air Temperature Sensor Circuit Low Input

P1116 ECT Sensor Circuit Out Of Self Test Range

P1117 ECT Sensor Signal Intermittent

P1120 Throttle Position Sensor Out Of Range Low

P1121 Throttle Position Sensor Signal Not Consistent With Mass Air Flow Signal

P1122 Throttle Position Stuck Closed

P1123 Throttle Position Stuck Open

P1124 Throttle Position Sensor Signal Out Of Self Test Range

P1125 Throttle Position Sensor Signal Intermittent - Read Our Article On Automotive Circuit Testing For Help With This Mazda Check Engine Light Code

P1126 Throttle Position (Narrow Range) Sensor Circuit - Read Our Article On Automotive Circuit Testing For Help With This Mazda Check Engine Light Code

P1127 HO2S Bank 1 Sensor 2 Heater Not On During Key On Engine Running Self Test

P1128 HO2S Bank 1 Sensor 1 Signals Swapped In Key On Engine Running Self Test

P1129 Downstream H02S Sensors Swapped

P1130 HO2S Bank 1 Sensor 1 Not Switching (Fuel Control Limit Reached) - Read Our Article On Oxygen Sensor Codes For Help With This Mazda Check Engine Light Code

P1131 HO2S Bank 1 Sensor 1 Signal Below 0.45v (A/F Ratio Too Lean) - Read Our Article On Oxygen Sensor Codes For Help With This Mazda Check Engine Light Code

P1132 HO2S Bank 1 Sensor 1 Signal Above 0.45v (A/F Ratio Too Rich) - Read Our Article On Oxygen Sensor Codes For Help With This Mazda Check Engine Light Code

P1133 Bank 1 Fuel Control Shifted Lean

P1134 Bank 1 Fuel Control Shifted Rich

P1135 HO2S Bank 1 Sensor 1 Heater Circuit Low Input

P1136 HO2S Bank 1 Sensor 1 Heater Circuit High Input

P1137 HO2S Bank 1 Sensor 2 Not Switching (Fuel Control Limit Reached) - Read Our Article On Oxygen Sensor Codes For Help With This Mazda Check Engine Light Code

P1138 HO2S Bank 1 Sensor 2 Signal Above 0.45v (A/F Ratio Too Rich) - Read Our Article On Oxygen Sensor Codes For Help With This Mazda Check Engine Light Code

P1141 HO2S Bank 1 Sensor 2 Heater Circuit Low Input

P1142 HO2S Bank 1 Sensor 2 Heater Circuit High Input

P1143 HO2S Bank 1 Sensor 3 Signal Below 0.45v (A/F Ratio Too Lean) - Read Our Article On Oxygen Sensor Codes For Help With This Mazda Check Engine Light Code

P1144 HO2S Bank 1 Sensor 3 Signal Above 0.45v (A/F Ratio Too Rich) - Read Our Article On Oxygen Sensor Codes For Help With This Mazda Check Engine Light Code

P1150 HO2S Bank 2 Sensor 1 Not Switching (Fuel Control Limit Reached) - Read Our Article On Oxygen Sensor Codes For Help With This Mazda Check Engine Light Code

P1151 HO2S Bank 2 Sensor 1 Signal Below 0.45v (A/F Ratio Too Lean) - Read Our Article On Oxygen Sensor Codes For Help With This Mazda Check Engine Light Code

P1152 HO2S Bank 2 Sensor 1 Signal Above 0.45v (A/F Ratio Too Rich) - Read Our Article On Oxygen Sensor Codes For Help With This Mazda Check Engine Light Code

P1153 Bank 2 Fuel Control Shifted Lean(FAOSC)

P1154 Bank 2 Fuel Control Shifted Rich (FAOSC)

P1169 HO2S Bank 1 Sensor 1 Circuit Fixed (Bank 1 Sensor 1)

P1170 HO2S Bank 1 Sensor 1 Circuit Fixed (Bank 1 Sensor 1)

P1173 HO2S Bank 2 Sensor 1 Circuit Fixed (Bank 2 Sensor 1)

P1182 Fuel Shut Off Solenoid Circuit

P1189 Pump Speed Signal

P1190 Calibration Resistor Out Of Range

P1191 TP (Controlled) Circuit

P1194 ECM, PCM, A/D Converter

P1195 EGR Boost Sensor Circuit

P1196 Ignition Switch Start Circuit

P1197 Mileage Switch Circuit

P1213 Start Injector Circuit

P1221 Traction Control System

P1222 Traction Control Output Circuit

P1226 Control Sleeve Sensor Circuit

P1235 Fuel Pump Control Circuit

P1236 Fuel Pump Control Out Range

P1248 Turbo Boost Pressure Not Detected

P1250 Pressure Regulator Control Solenoid Circuit

P1251 Air Mixture Solenoid Circuit

P1252 Pressure Regulator Control Solenoid '2' Circuit

P1260 Anti-Theft System Signal Detected - Engine Disabled

P1270 Engine RPM or Vehicle Speed Limit Reached

P1279 Control Sleeve Sensor Circuit Range/Performance

P1298 Injector Driver Module Failure

P1309 Misfire Detection Monitor

P1312 Injection Pump Timing Actuator Circuit

P1318 Injection Timing Piston Position Sensor Circuit

P1319 Injection Timing Piston Position Sensor Circuit Range/Performance

P1345 No CMP or SGC Signal

P1351 Ignition Diagnostic Monitor Signal Lost To PCM Or Out Of Range

P1352 Ignition Coil 'A' Primary Circuit

P1353 Ignition Coil 'B' Primary Circuit

P1354 Ignition Coil 'C' Primary Circuit

P1358 Ignition Diagnostic Monitor Signal Out Of Self Test Range

P1359 SPOUT Signal Lost To Powertrain Control Module Or Out Of Range

P1360 Ignition Coil 'A' Secondary Circuit

P1361 Ignition Coil 'B' Secondary Circuit

P1362 Ignition Coil 'C' Secondary Circuit

P1364 Ignition Coil Primary Circuit

P1365 Ignition Coil Secondary Circuit

P1382 Camshaft Position Timing Solenoid #1 Circuit

P1387 Camshaft Position Timing Solenoid #2 Circuit

P1390 Octane Adjust Shorting Bar Out or Circuit Open

P1400 DPFE Sensor Circuit Low Input - Read Our Article on EGR Valve Codes For Help With This Mazda Check Engine Light Code

P1401 DPFE Sensor Circuit High Input - Read Our Article on EGR Valve Codes For Help With This Mazda Check Engine Light Code

P1402 EGR Valve Position Sensor Circuit - Read Our Article on EGR Valve Codes For Help With This Mazda Check Engine Light Code

P1405 DPFE Sensor Upstream Hose Off Or Plugged - Read Our Article on EGR Valve Codes For Help With This Mazda Check Engine Light Code

P1406 DPFE Sensor Downstream Hose Off Or Plugged - Read Our Article on EGR Valve Codes For Help With This Mazda Check Engine Light Code

P1407 No EGR Flow Detected - Read Our Article On EGR Valve Codes For Help With This Mazda Check Engine Light Code

P1408 EGR System Flow Out Of Key On Engine Running Self Test Range - Read Our Article on EGR Valve Codes For Help With This Mazda Check Engine Light Code

P1409 EGR Vacuum Regulator Solenoid Circuit

P1410 EGR Boost Solenoid Valve Stuck

P1412 Exhaust Gas Recirculation Valve Frozen - Read Our Article on EGR Valve Codes For Help With This Mazda Check Engine Light Code

P1415 Air Pump Circuit

P1416 Port Air Circuit

P1417 Port Air Relief Circuit

P1418 Split Air #1 Circuit

P1419 Split Air #2 Circuit

P1439 Floor Temp Switch Circuit

P1443 EVAP System Purge Flow Fault

P1444 EVAP Purge Flow Sensor Circuit Low Voltage

P1445 EVAP Purge Flow Sensor Circuit High Voltage

P1446 Evaporative Vacuum Solenoid Circuit

P1449 Evaporative Check Solenoid Circuit

P1450 Unable To Bleed Up Fuel Tank Vacuum

P1451 Canister Vent Solenoid Circuit

P1455 Fuel Tank Level Sensor Circuit

P1456 Fuel Tank Temperature Sensor Circuit

P1457 Purge Solenoid Control System

P1460 Wide Open Throttle A/C Cut-Off Relay Circuit

P1464 Air Conditioning Control Signal Circuit

P1473 Fan Circuit Open (VLCM)

P1474 Fan Control (Primary Winding) Circuit

P1475 Fan Relay (Low) Circuit

P1476 Fan Relay (High) Circuit

P1477 Additional Fan Relay Circuit

P1479 Fan Control (Condenser Primary) Circuit

P1485 EGR Vacuum Solenoid Circuit - Read Our Article on EGR Valve Codes For Help With This Mazda Check Engine Light Code

P1486 EGR Vent Solenoid Circuit

P1487 EGR-CHK (Boost) Solenoid Circuit

P1491 Secondary Switch Solenoid Circuit

P1492 APLSOL Solenoid Circuit

P1493 RCNT Solenoid Circuit

P1495 TCSPL Solenoid Circuit

P1496 EGR Valve Motor Coil '1' Open or Shorted

P1497 EGR Valve Motor Coil '2' Open or Shorted

P1498 EGR Valve Motor Coil '3' Open or Shorted

P1499 EGR Valve Motor Coil '4' Open or Shorted

P1500 Vehicle Speed Sensor Intermittent Signal

P1501 Vehicle Speed Sensor Out Of Self Test Range

P1502 Vehicle Speed Sensor Circuit Error

P1504 Idle Air Control Solenoid Circuit Intermittent

P1505 Idle Air Control System At Adaptive Clip

P1506 Idle Air Control System Overspeed Detected

P1507 Idle Air Control System Underspeed Detected

P1508 Bypass Air Solenoid '1' Circuit

P1509 Bypass Air Solenoid '2' Circuit

P1510 Idle Signal Circuit

P1511 Idle Switch (Electric Control Throttle) Circuit

P1512 VTCS Fault

P1515 Electric Current Circuit

P1521 VRIS Solenoid '1' Circuit

P1522 VRIS Solenoid '2 Circuit

P1523 VICS Solenoid Circuit

P1524 Charge Air Cooler Bypass Solenoid Circuit

P1525 ABV Vacuum Solenoid Circuit

P1526 ABV Vent Solenoid Circuit

P1527 Bypass Air Solenoid (Accelerate Warmup) Circuit

P1528 Subsidiary Throttle Valve Solenoid Circuit

P1529 L/C Atmospheric Balance Air Control Valve Circuit

P1540 ABV System Fault

P1562 Powertrain Control Module +B Voltage Low

P1566 TCM B+ Voltage Low

P1569 IMRC Circuit Low

P1570 IMRC Circuit High

P1600 Loss Of KAM Power, Circuit Open

P1601 Powertrain Control Module Communication Line To TCM Error

P1602 Powertrain Control Module Communication Line To TCM Error

P1602 Immobilizer System Communication Error With Powertrain Control Module

P1603 Immobilizer System Fault

P1604 Immobilizer System Fault

P1605 Powertrain Control Module Keep Alive Memory Test Error

P1608 Powertrain Control Module (ECM CPU) DTC Test Fault

P1609 Powertrain Control Module (ECM CPU) Knock Sensor Circuit

P1621 Immobilizer System Fault

P1622 Immobilizer System Fault

P1623 Immobilizer System Fault

P1624 Immobilizer System Fault

P1627 Powertrain Control Module (ECM/TCS) Line Communication Error

P1628 Powertrain Control Module (ECM/TCS) Any Line Communication Error

P1630 Alternator Regulator #1 Control Circuit

P1631 Generator Output Voltage Signal (No Output)

P1632 Battery Voltage Monitor Circuit

P1633 Battery Overcharge Fault

P1634 Generator Terminal 'B' Circuit Open

P1645 Fuel Pump Resistor Switch Circuit

P1649 Fuel Injection Pump Module

P1650 Power Steering Pressure Switch Out Of Range Fault

P1651 Power Steering Pressure Switch Circuit

P1652 Power Steering Pressure Switch Circuit

P1680 Metering Oil Pump Failure

P1682 Metering Oil Pump Failure

P1683 Metering Oil Pump Temperature Sensor Circuit

P1684 Metering Oil Pump Position Sensor Circuit

P1685 Metering Oil Pump Stepping Motor Cont. Circuit

P1686 Metering Oil Pump Stepping Motor Cont. Circuit

P1687 Metering Oil Pump Stepping Motor Cont. Circuit

P1688 Metering Oil Pump Stepping Motor Cont. Circuit

P1689 Oil Pressure Control Solenoid Circuit

P1690 Wastegate Solenoid Circuit

P1691 Turbo Pressure Control Solenoid Circuit

P1692 Turbo Control Solenoid Circuit

P1693 Turbo Charge Control Circuit

P1694 Turbo Charge Relief Circuit

P1701 Transmission Range Sensor Reverse Engagement Error

P1702 Transmission Range Sensor Circuit Intermittent

P1703 Brake On/Off Switch Out Of Self Test Range

P1705 Transmission Range Sensor Out Of Self Test Range

P1706 High Vehicle Speed Observed In Park

P1708 Clutch Switch Circuit

P1709 Clutch Pedal Position Switch Circuit

P1710 Transmission Control Module Solenoid/Internal Ground Circuit

P1711 Transmission Fluid Temperature Sensor Circuit Out Of Self Test Range

P1713 Transmission Fluid Temperature Sensor Circuit

P1714 Shift Solenoid '1' Mechanical Fault

P1715 Shift Solenoid '2' Mechanical Fault

P1716 Shift Solenoid '3' Mechanical Fault

P1717 Shift Solenoid '4' Mechanical Fault

P1718 Transmission Fluid Temperature Sensor Circuit

P1719 Engine Torque Signal

P1720 Vehicle Speed Sensor '2' Signal Error

P1721 Gear 1 Incorrect Ratio

P1722 Gear 2 Incorrect Ratio

P1723 Gear 3 Incorrect Ratio

P1724 Gear 4 Incorrect Ratio

P1729 Transmission 4x4 Low Switch Error

P1735 First Gear Switch Circuit Failure

P1736 Second Gear Switch Circuit Failure

P1737 Lockup Solenoid

P1738 Shift Time Error

P1739 Slip Solenoid

P1740 Torque Converter Clutch Solenoid Mechanical Fault

P1741 Torque Converter Clutch Control Electrical Fault

P1742 Torque Converter Clutch Solenoid Shorted

P1743 Torque Converter Clutch Failed On - TCIL Is On

P1744 Torque Converter Clutch Solenoid Mechanical Fault

P1745 Line Pressure Solenoid

P1746 Electronic Pressure Control Solenoid Circuit Open

P1747 Electronic Pressure Control Solenoid Circuit

P1748 Pressure Control Solenoid 'A'

P1749 Electronic Pressure Control Solenoid Circuit Low

P1751 Transmission Shift Solenoid 'A' Mechanical Fault

P1752 Transmission Shift Solenoid 'A' Circuit Shorted

P1754 Transmission Coast Clutch Solenoid Electrical Fault

P1756 Transmission Shift Solenoid 'B' Mechanical Fault

P1757 Transmission Shift Solenoid 'B' Circuit Shorted

P1759 2-4 Brake Failsafe Valve Malfunction

P1761 Transmission Shift Solenoid '3' Mechanical Fault

P1762 Transmission SS3/SS4/OD Band Fault

P1763 Low And Reverse Brake Pressure Switch Circuit

P1764 Low And Reverse Brake Failsafe Valve Malfunction

P1765 Transmission 3-2 Timing Solenoid Valve

P1767 Torque Converter Clutch Solenoid Circuit

P1770 Clutch Solenoid Circuit

P1771 Throttle Position Sensor Circuit Open To Transmission Control Module

P1772 Throttle Position Sensor Circuit Shorted To Transmission Control Module

P1775 Torque Down Signal #1 Circuit

P1776 Toqure Down Signal #2 Circuit

P1777 Torque Down Response Signal Circuit

P1780 Transmission Control Switch Circuit

P1780 Overdrive Off Switch Not Cycled During The Self Test

P1781 Transmission 4x4 Low Switch Out Of Range Fault

P1783 Transmission Fluid Temperature High Input

P1788 Pressure Control Solenoid 'B' Circuit Open

P1789 Pressure Control Solenoid 'B' Circuit Shorted

P1790 TP (Mechanical) Circuit

P1791 TP (Electric) Circuit

P1792 Barometer Pressure Circuit

P1793 Intake Air Volume Circuit

P1794 Powertrain Control Module Battery Direct Power Circuit

P1795 Idle Switch Circuit

P1796 Kick Down Switch Circuit

P1797 P/N Switch Open Or Short Circuit

P1798 Coolant Temperature Circuit

P1799 Hold Switch Circuit

P1900 Turbine Speed Sensor Circuit Intermittent

P1901 Torque Converter Clutch Circuit Intermittent

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