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.
2000 Mazda MPV DXFACTORY OEM SERVICE PROCEDURE
EGR Boost Sensor
- Connect NGS scan tool to Data Link Connector (DLC). DLC is located under left side of instrument panel, right of steering column. Turn ignition on. Using scan tool, access DIAGNOSTIC DATA LINK menu, and select PCM. Highlight and select PID/DATA MONITOR AND RECORD. Select BARO V PID.
- Apply vacuum to sensor and monitor voltage. See EGR BOOST SENSOR SPECIFICATIONS table. If vacuum is exceeded, sensor will be damaged. If all voltage readings are as specified, EGR boost sensor is functioning properly. If any voltage reading is not as specified, go to next step.
- Turn ignition off. Check continuity of circuits between EGR boost sensor wiring harness connector and PCM. See appropriate wiring diagram in WIRING DIAGRAMS article. If continuity exists in all circuits, go to next step. If continuity does not exist in one or more circuits, repair wiring harness as necessary.
- Turn ignition on. Measure voltage at terminal "B" at fuel pressure sensor wiring harness connector. See Fig 1 . Voltage should be less than one volt. Measure voltage at terminal "C" at fuel tank pressure sensor wiring harness connector. Voltage should be 4.5-5.5 volts. If voltage is as specified, replace fuel tank pressure sensor. If voltage is not as specified, locate and repair short circuit in wiring harness. See appropriate wiring diagram in WIRING DIAGRAMS article.
EGR BOOST SENSOR SPECIFICATIONS
| Vacuum Applied (In. Hg) | Volts | |
|---|---|---|
| Millenia 2.5L & 626 | ||
| 0.0 | 3.6-4.4 | |
| 16.1 | 1.66-2.03 | |
| 24.0 | 0.711-0.867 | |
| MPV | ||
| 7.9 | .8-1.3 | |
| Protege | ||
| 0.0 | 2.5-4.9 | |
| 17.9 | 1.0-1.3 | |
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.