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part of data stream of the engine, and then observe if part of data stream of the oxygen sensor is around 100 under standard idling operation. No Replace the sensor or the three-way catalytic converter 12 Start the engine and let it run at idle speed until coolant temperature reaches normal value.
Next step Yes Check other part 13 Connect special diagnostic tester for Chery to read part of data stream of the engine, and then carefully observe part of data stream of the sensor; rapidly apply the accelerator pedal for several times and observe if the output voltage of the oxygen sensor fluctuates within a comparatively large scope. No Replace the sensor
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