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 MANUALSMAZDA20086 S SPORT, 4D HATCHBACK, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1 (ENGINE CONTROLS - SYSTEM & COMPONENT TESTING)EMISSION SYSTEMS & SUB-SYSTEMSEXHAUST GAS RECIRCULATION (EGR) SYSTEMEGR BOOST SENSOR
2008 Mazda 6 s Sport, 4D Hatchback, Standard
EGR Boost Sensor
2008 Mazda 6 s Sport, 4D Hatchback, StandardSECTION EGR Boost Sensor
WARNING: This page is about a different car, the 2001 Mazda Protege, 2001 Mazda Millenia, 2001 Mazda MX-5 Miata, 2001 Mazda MPV, and 2001 Mazda 626. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Millenia 2.3L & Miata models are not equipped with EGR Boost Sensor
- Connect NGS scan tool to DLC-2. DLC-2 is located under left side of instrument panel. 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.
- Ensure BARO V PID is within specification. Voltage should be 2.3-4.7 volts. If BARO voltage is not as specified, locate and repair open or short circuit in wire harness between EGR boost sensor and PCM. See Fig 1 . See WIRING DIAGRAMS article. If voltage is as specified, go to next step.
- Apply vacuum to EGR boost sensor and monitor BARO voltage. If vacuum is exceeded, EGR boost sensor will be damaged. Voltage should vary between 0.8-1.3 volts. If voltage readings vary as vacuum is applied, EGR boost sensor is functioning properly. If voltage readings do not vary as vacuum is applied, replace EGR boost sensor.
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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.