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 MANUALSCHEVROLET1987SUBURBAN 1/2 TON 4WD V8-350 5.7LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSOXYGEN SENSORDESCRIPTION AND OPERATION
1987 Chevrolet Suburban 1/2 Ton 4WD V8-350 5.7L
Oxygen Sensor: Description and Operation
1987 Chevrolet Suburban 1/2 Ton 4WD V8-350 5.7LSECTION Description and Operation
Fig. 6 Oxygen Sensor (Typical):
The exhaust oxygen sensor is located in the exhaust system and monitors oxygen content in the exhaust gas stream. The oxygen content of the exhaust gas reacts with the oxygen sensor to produce a voltage output, Fig. 6. By monitoring the oxygen sensor output voltage, the ECM can determine the amount of oxygen in the exhaust gas and adjust the air/fuel mixture accordingly.
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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.