Do not touch the sensor or the heat shield until the engine cools down.ĭisconnect the O2 sensor. Downstream sensors Bank 1 Sensor 2 and Bank 2 Sensor 2 can be accessed from under the vehicle. Locate the oxygen sensor on the exhaust manifold. Remove the negative clamp from the battery. Disconnect the negative battery terminal.Pull the hood release under the dashboard on the driver’s side.Park the Chevrolet on level ground and set the parking brakes. Most universal oxygen sensors do not come prewired for your vehicle and are not plug-and-play. Get a quote and book an appointment online or speak to a service advisor at 1-80.A universal oxygen sensor can also be used, but you will need to do the wiring in many cases by following the provided diagram. YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Cleaning the sensor may or may not fix the problem. This oil coats the sensor and can cause it to become inaccurate. The no response of an O2 sensor may be due to a mass airflow sensor that is contaminated from things like oil from an oil impregnated air filter, as is common to all sensors.
O2 sensor 2011 equinox locations code#
The no response of the O2 sensor can be caused by a mass airflow sensor being contaminated and not calculating the amount of air entering the engine on the intake side. Check the mass airflow sensor for proper operation and contamination before replacing the O2 sensor.Monitors the mass airflow sensor data for responses to throttle changes, per specificationsįollows the manufacturer's specific pinpoint tests for further diagnosis of the code (tests differ between manufacturers)Ĭommon mistakes when diagnosing the P0140 code? Monitors the O2 sensor data to see if the voltage is is moving above or below 410-490 mV Scans codes and documents freeze frame data How does a mechanic diagnose the P0140 code? The ECM loses the ability to keep the fuel system air-to-fuel ratio correct (could cause erratic driving symptoms) Hesitation (upon acceleration after a deceleration phase) The Check Engine Light will come on, indicating a problem The ECM could be malfunctioning in the O2 circuit
The O2 sensor and mass airflow sensor comparison is misinterpreted by the ECM The O2 sensor for Bank 1, Sensor 2 does not respond (does not have a voltage change between 410-490 mV) to the fuel cutoff or fuel enrichment signals from the ECM for more than 74 seconds The ECM determines that the O2 sensor has no activity P0140 is the OBD-II generic code which indicates that the O2 sensor for Bank 1, Sensor 2 failed respond to the fuel cutoff or fuel enrichment signals by the Engine Control Module (ECM). O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 2) What the P0140 code means
0 kommentar(er)
