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.
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HOMESERVICE MANUALSMAZDA1999626 ES, 2.5 D, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)QUICK LOOKUPSDTC INDEXENGINE PERFORMANCE DTCS
1999 Mazda 626 ES, 2.5 D, Standard
Engine Performance DTCS
1999 Mazda 626 ES, 2.5 D, StandardSECTION Engine Performance DTCS
ENGINE PERFORMANCE DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| P0102 | MASS AIRFLOW (MAF) SENSOR |
| P0103 | MASS AIRFLOW (MAF) SENSOR |
| P0106 | EGR BOOST SENSOR |
| P0107 | EGR BOOST SENSOR |
| P0108 | EGR BOOST SENSOR |
| P0112 OR P0117 | TEMPERATURE SENSOR INPUT LOW (IAT OR ECT) |
| P0113, P0118, P1112 OR P1117 | TEMPERATURE SENSOR (IAT OR ECT) |
| P0122 | THROTTLE POSITION (TP) SENSOR LOW INPUT |
| P0123 | THROTTLE POSITION (TP) SENSOR HIGH INPUT |
| P0125 | EXCESSIVE TIME TO ENTER CLOSED LOOP |
| P0133 OR P0153 | HEATED OXYGEN SENSOR (LOW RESPONSE) |
| P0135, P0141, P0147 OR P0155 | HEATED OXYGEN SENSOR HEATER |
| P0136, P1137 OR P1138 | FUEL CONTROL |
| P0142, P1143 OR P1144 | FUEL CONTROL |
| P0171, P0172, P0174, P0175, P1130, P1131, P1132, P1150, P1151 OR P1152 | FUEL CONTROL - HO2S NOT SWITCHING |
| P0230 | FUEL PUMP RELAY |
| P0300, P0301, P0302, P0303, P0304, P0305 OR P0306 | MISFIRE DETECTION MONITOR |
| P0320 | DISTRIBUTOR IGNITION |
| P0325 | KNOCK SENSOR (KS) CIRCUIT |
| P0340 | CAMSHAFT POSITION (CMP) SENSOR CIRCUIT |
| P0400 | EGR FLOW MALFUNCTION |
| P0420 OR P0421 | CATALYST EFFICIENCY MONITOR & EXHAUST SYSTEMS |
| P0442 | EVAPORATIVE EMISSION SYSTEM (SMALL LEAK) |
| P0443 | EVAPORATIVE EMISSION SYSTEM |
| P0446 | EVAPORATIVE EMISSION SYSTEM |
| P0452 | EVAPORATIVE EMISSION SYSTEM |
| P0453 | EVAPORATIVE EMISSION SYSTEM |
| P0455 | EVAPORATIVE EMISSION SYSTEM (LARGE LEAK) |
| P0460 | FUEL GAUGE SENDER UNIT |
| P0500 | VEHICLE SPEED SENSOR (VSS) |
| P0505, P1504 OR P1507 | IDLE AIR CONTROL (IAC) VALVE |
| P0603 OR P0605 | POWERTRAIN CONTROL MODULE MALFUNCTION |
| P0703 OR P1703 | BRAKE SWITCH MALFUNCTION |
| P0704 | CLUTCH SWITCH INPUT CIRCUIT |
| P1001 | UNABLE TO ACTIVATE SELF-TEST/SCP COMMUNICATION ERROR CODE NOT LISTED |
| P1100 | MASS AIRFLOW (MAF) SENSOR INTERMITTENT |
| P1101 | MASS AIRFLOW (MAF) SENSOR OUT OF RANGE |
| P1116 | ECT SENSOR |
| P1120 | THROTTLE POSITION (TP) SENSOR OUT OF RANGE (LOW) |
| P1121 | THROTTLE POSITION (TP) SENSOR |
| P1124 | THROTTLE POSITION (TP) SENSOR OUT OF RANGE |
| P1125 | THROTTLE POSITION (TP) SENSOR |
| P1127 | FUEL CONTROL |
| P1250 | FUEL PRESSURE REGULATOR CONTROL (FPRC) SOLENOID |
| P1409 | EGR VALVE MALFUNCTION |
| P1410 | EGR BOOST SOLENOID VALVE STUCK |
| P1450 | EVAP CONTROL SYSTEM |
| P1451 | CANISTER DRAIN CUT VALVE (CDCV) MALFUNCTION |
| P1460 | WOT A/C CUT-OFF (WAC) |
| P1460 | WOT A/C CUT-OFF (CONTINUOUS MEMORY) |
| P1464 | A/C DEMAND OUT OF RANGE |
| P1474 OR P1479 | FAN CONTROL (FC) RELAY |
| P1474 OR P1479 | FAN CONTROL (FC) RELAY (CONTINUOUS MEMORY) |
| P1487 | EGR BOOST SOLENOID VALVE CIRCUIT |
| P1501 | VEHICLE SPEED SENSOR (VSS) |
| P1506 | IDLE AIR CONTROL (IAC) VALVE |
| P1602 | IMMOBILIZER UNIT TO PCM COMMUNICATION |
| P1603 OR P1604 | CODE WORD OR KEY ID NUMBER NOT REGISTERED IN PCM |
| P1621 | CODE WORD OR KEY ID NUMBER NOT REGISTERED IN PCM |
| P1622 | KEY ID NUMBER DOES NOT MATCH |
| P1623 | CODE WORD OR KEY ID NUMBER READ/WRITE ERROR IN PCM |
| P1624 | IMMOBILIZER COMMUNICATION COUNTER = 0 |
| P1650 | POWER STEERING PRESSURE (PSP) SWITCH |
| P1652 | POWER STEERING PRESSURE (PSP) SWITCH |
| P1703 | BRAKE SWITCH OUT OF RANGE |
RENDER: 1.0x
NO RELATED
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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.