Chemistry, 30.07.2021 03:30, bloodry

Tech A says that the PCM monitors the pre-cat and post-cat oxygen sensors to determine catalytic converter efficiency. Tech B says that a catalytic converter can be tested by graphing the oxygen sensor readings on a scan tool or lab scope and comparing them. Who is correct

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Tech A says that the PCM monitors the pre-cat and post-cat oxygen sensors to determine catalytic con...