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Genuine Acura Legend Oxygen Sensor
Oxygen O2 Sensor- Select Vehicle by Model
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6 Oxygen Sensors found
Acura Legend Oxygen Sensor
The Acura Legend Oxygen Sensor is vital because it monitors exhaust oxygen levels and lets the engine computer keep the air fuel mix just right for clean running. Mounted in the exhaust before and after the catalytic converter, this Oxygen Sensor compares leftover oxygen to outside air, then sends a voltage that swings between 0.1 and 0.9 volts, signaling rich or lean mixtures so the computer lengthens or shortens injector pulses in milliseconds. Each Acura model of the Legend line uses a heated zirconia Oxygen Sensor element inside a threaded steel case, its heater bringing it quickly to the 600 degree working temperature needed for closed loop control. The upstream Oxygen Sensor cycles several times per second on an Acura while the downstream unit verifies converter efficiency. Earlier years relied on a narrow band design, while later Legend editions adopted a wideband air fuel ratio type that feeds the computer a more precise current signal across a broader mix range. Both styles of sensors can be fouled by contaminants, and a failed Oxygen Sensor on any Acura Legend will trigger warning lights, raise emissions, and hurt mileage.
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Acura Legend Oxygen Sensor Parts Questions & Experts Answers
- Q: How to check and replace the Crankshaft Position Sensor, Intake Manifold Temperature Sensor, MAP Sensor and Oxygen Sensor on Acura Legend?A:All Legend models and 1986 and 1987 Integra models require checking the oxygen sensor by turning the ignition switch to OFF, removing the ALTERNATOR SENSE fuse for 10 seconds on all Legends or the HAZARD fuse in the main fusebox on Integra, checking fuel pressure, warming the engine, blocking the rear wheels, raising the vehicle, locating the oxygen sensor, starting the engine, disconnecting the wire harness, raising engine speed, measuring voltage with a digital voltmeter, replacing the sensor if test results are incorrect, or checking the wire harness if results are correct. The MAP sensor diagnosis requires checking the vacuum hose and electrical connector followed by turning off the ignition switch and removing the correct fuse to warm up the engine and disconnect the electrical connector before inserting a test harness and measuring voltage as a replacement MAP sensor is needed if voltage checks pass otherwise seek professional diagnosis of the circuit. The crank angle sensor employs two sensors which reside at the right end of the front cylinder head and within the distributor for Legend models while requiring measurement of CRANK circuit resistance and CYL circuit continuity before deciding whether to replace the sensor or to get the system diagnosed when correct measurements are obtained. To replace this sensor one must remove the cruise control actuator together with the timing belt cover and timing belt and bolts before inserting a new sensor. Prior to dealing with the throttle angle sensor maintenance you need to shut off the ignition and untie the correct fuse then heat your engine before disconnecting the electrical connector and checking the voltage output before deciding if you should replace or check the circuit depending on test results. The replacement process begins by disconnecting the electrical connector followed by screw removal. After inserting the new switch and reattaching the electrical connector the task completes. To test the intake air temperature sensor start by disconnecting its electrical connector then measure its resistance before replacing it with a new unit or seeking further vehicle assessment if its condition is acceptable. The replacement procedure requires letting go of the electrical connector while removing screws before performing the removal steps in reverse order.
