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Children water fish truck

With fault diagnostic engine electronic control system were examined. boiler mact Fault code read as P0131 - Oxygen sensor circuit voltage is too low. Remove boiler mact the oxygen sensor, the surface has no carbon, reliable measurement of each wire connection, indicating that the oxygen sensor is normal. But the oxygen sensor feedback voltage is always less than 0.45V, described the mixture too lean. Disconnect boiler mact the water temperature sensor harness connector, connected to a rheostat adjusted to 4 ~ 8kΩ (due to a water temperature sensor controls the fuel injection quantity correction signal, reducing the amount of fuel injection temperature is high, increasing the amount of low temperature boiler mact fuel injection, plus a 4 ~ 8kΩ, quite increases boiler mact the fuel injection quantity at 0 ) once again test found the oxygen sensor feedback voltage close to 0.9V, further indicating that the oxygen sensor is normal, but the mixture is too lean.
Editor's Note: EGR valve pipe the exhaust pipe connected with the intake manifold, the vacuum chamber at the top of its true air by EGR control solenoid valve control, EGR control solenoid valve controlled by the ECU. ECU based on the engine speed, air flow, air pressure, temperature of the EGR control signal to control the length of time the solenoid coil is energized to control the EGR valve into the vacuum chamber at the top of vacuum boiler mact air, thereby controlling the opening degree of the EGR valve to change the recirculation involved of emissions. In the upper part there is an EGR valve position sensor, its function boiler mact is to detect the opening degree of the EGR valve position and its use position to the potentiometer corresponding to the voltage signal back to the ECU, as a reference signal to control the exhaust gas recirculation. EGR system boiler mact does not work in the idle condition.
After starting the vacuum disconnect the EGR valve, the hand was found to block the vacuum suction tube, this time under normal circumstances there is no vacuum. Just because there is a vacuum suction resulting in emissions at idle condition cycle, resulting in the mixture is too thin, unstable idle. Thus Disconnect harness boiler mact connector boiler mact EGR control solenoid valve, said vacuum still found in vacuo (in the case of no electricity EGR valve EGR control solenoid valve shut-off the vacuum to the EGR control valve in the pipeline), the full description of the EGR control valve is faulty. Further examination revealed that the valve is dirty, then use carburetor cleansing agent cleansing and instillation of two drops of clean engine oil, troubleshooting refitted.
Well, today, to share here, repairing a car is not easy. Outside of work, do not forget to relax, share a Mito, seductive, self-cultivation, cultivation.

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The above statements represent their personal views do not represent the views or position of Sina.