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.
1998 Mazda B2500 SX, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls - Tests W/Codes - Testing
- Self-Diagnostics
- Diagnostic Trouble Codes
- Diagnostic Trouble Code Identification Table
- DTC P0102: Mass Airflow (MAF) Sensor
- DTC P0103: Mass Airflow (MAF) Sensor
- DTC P0112 Or P0117: Temperature Sensor Test (IAT & ECT)
- DTC P0112, P0113, P0117, P0118, P1112 Or P1117: Continuous Memory, Temperature Sensor Test (IAT Or ECT)
- DTC P0113 Or P0118: Temperature Sensor Test (IAT Or ECT)
- DTC P0121: Throttle Position (TP) Sensor
- DTC P0122: Throttle Position (TP) Sensor
- DTC P0123: Throttle Position (TP) Sensor
- DTC P0125: Excessive Time To Enter Closed Loop
- DTC P0131 Or P0151: Contaminated Ho2S/Voltage Shift
- DTC P0133 Or P0153: Fuel Control
- DTC P0135, P0141 Or P0155: Ho2S Heater Circuit
- DTC P0136, P1137 Or P1138: Fuel Control
- DTC P0171, P0172, P0174 Or P0175: Fuel Control
- DTC P0230: Fuel Pump Relay
- DTC P0231: Fuel Pump Relay
- DTC P0232: Fuel Pump Relay
- DTC P0300, P0301, P0302, P0303, P0304, P0305 Or P0306: Misfire Detection Monitor
- DTC P0320: Ignition Diagnostic Monitor
- DTC P0340: Cylinder Identification (CID) Circuit
- DTC P0350, P0351, P0352, P0353 Or P0354: Integrated Ignition Coil Failure
- DTC P0401, P1408: EGR Monitor & System
- DTC P0402: EGR System
- DTC P0420 Or P0430: Catalyst Efficiency Monitor & Exhaust Systems
- DTC P0442: Evaporative Emission Purge Flow System
- DTC P0443: Evaporative Emission Purge Flow System
- DTC P0446: Evaporative Emission System
- DTC P0452: Evaporative Emission System
- DTC P0453: Evaporative Emission System
- DTC P0445: Evaporative Emission System
- DTC P0460: Fuel Level Input
- DTC P0500, P0501, P0503, P1500 Or P1501: Vehicle Speed Sensor (VSS)
- DTC P0505, P1504 Or P1507: Idle Air Control (IAC) Valve
- DTC P0603: Powertrain Control Module Malfunction
- DTC P0703 Or P1703: Brake Pedal Position (BPP) Switch
- DTC P0704 Or P1709: Clutch Pedal Position (CPP) Switch
- DTC 1000: OBD-II Monitor Testing Not Complete
- DTC P1001: Unable To Activate Self-Test/SCP Communication Error Code Not Listed
- DTC P1100: Mass Airflow (MAF) Sensor
- DTC P1101: Mass Airflow (MAF) Sensor
- DTC P1116: Temperature Sensor Test (IAT & ECT)
- DTC P1120: Throttle Position (TP) Sensor
- DTC P1121: Throttle Position (TP) Sensor
- DTC P1124: Throttle Position (TP) Sensor
- DTC P1125: Throttle Position (TP) Sensor
- DTC P1127: Ho2S Heater
- DTC P1128 Or P1129: Ho2S Signals Swapped
- DTC P1130, P1150: Ho2S Not Switching
- DTC P1131 Or P1151: Ho2S Not Switching Lean
- DTC P1132 Or P1152: Ho2S Not Switching Rich
- DTC P1260: Anti-Theft System
- DTC P1270: Engine Rpm/Vehicle Speed Limit
- DTC P1309: Misfire Detection Monitor
- DTC P1400 Or P1401: EGR System
- DTC P1405 Or P1406: EGR System
- DTC P1409: EGR Vacuum Regulator
- DTC P1450: Vapor Management Valve (VMV)
- DTC P1451: Canister Vent Solenoid
- DTC P1460: Wot A/C Cut-Off Except Continuous Memory
- DTC P1460: Wot A/C Cut-Off Continuous Memory
- DTC P1464: Wot A/C Cut-Off (WAC)
- DTC P1505: Idle Air Control (IAC) Valve
- DTC P1506: Idle Air Control (IAC) Valve
- DTC P1650 Or P1651: Power Steering Pressure (PSP) Switch
- DTC P1729 Or P1781: 4WD Shift Control Switch
- Diagnostic Test Z (Intermittent)
Factory Service Tools
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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.
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