1, the solution to the fault of the exhaust temperature sensor, first remove the connector of the sensor, so that the probe of the voltmeter touches the connector of the sensor end. First make the engine in the idle warm up state, the voltmeter data should be greater than the reference value, and then turn the air flow meter adjustment screw to the left, so that the concentration of the mixture becomes thinner, then the voltmeter should be lower than the reference value. Oxygen sensor damaged, usually should be replaced;
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2, unplug the sensor harness plug, remove the sensor, put the sensor in water and heat the water, and measure the resistance between the two terminals of the sensor at different temperatures. The measured resistance value is compared with the standard value, if it does not meet the standard, it should be replaced;
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3. Pull out the plug of the harness of the throttle position sensor and check the conduction between the terminals with a multimeter. When the throttle is in the idle position, the middle and upper terminals should be engaged. After the throttle is opened, the middle and upper terminals should be disconnected, and the results should be adjusted if they are not consistent with the above.