What are the symptoms of a faulty rear oxygen sensor?

1 Answers
LeLucas
07/29/25 3:53pm
Engine rear oxygen sensor failure can cause the engine malfunction indicator light to illuminate, and may lead to symptoms such as vehicle shaking with jerking sensations, insufficient power, popping sounds from the exhaust, strong unpleasant odors, car jerking, slow acceleration, inability to reach speed, and increased fuel consumption. Rear oxygen sensor working principle: The rear oxygen sensor detects the oxygen content in the purified exhaust gas and feeds it back to the ECU. The computer then compares this data with that from the front oxygen sensor. If the data from both sensors are identical (normally the front oxygen sensor signal is greater than the rear), it can be determined that the three-way catalytic converter has failed.
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