Ranger 4WD V6-245 4.0L VIN X SFI (1999)
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monitors oxygen content after it flows through the catalytic converter.
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provides a voltage to the powertrain control module used to calculate catalytic converter integrity.
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DTCs are set.
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If the engine reaches critical temperature, the following happens:
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The coolant temperature gauge pointer will read fully hot at approximately 121°C(250°F).
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The check gauge warning indicator will illuminate.