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    Todays Technician Advanced Engine Performance Classroom Manual and Shop Manual
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    Exam 10: Strategies of on Board Diagnostic Non Continuous Monitors
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    What Is Indicated to the PCM If the Post-Oxygen Sensor
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What Is Indicated to the PCM If the Post-Oxygen Sensor

Question 17

Question 17

Short Answer

What is indicated to the PCM if the post-oxygen sensor switches from rich to lean frequently (has a high precatalyst to postcatalyst ratio) ?

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The catalyst is not ...

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