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HEGO stands for heated oxygen sensor.
heated exhaust gas oxygen sensor
HEGO is heated exhaust gas oxygen (sensor/system) VMV is the vapor management valve EVMV is the electric vapor management valve (Helpfull)
According to the 2001 Lincoln Navigator Owner Guide : In the power distribution box ( which is " live " ) located in the engine compartment on the drivers side ( fuse # 23 is a 15 amp fuse for the HEGO sensors , canister vent , transmission , and CMS sensor ) * HEGO stands for Heated Exhaust Gas Oxygen sensor *
Heated Exhaust Gas Oxygen ( sensor )
On a 1996 Mercury Mystique : In the Power Distribution Box ( which is " live " ) located in the engine compartment between the battery and the drivers side fender ( # 13 is a 15 amp fuse for the HEGO sensor ) * HEGO is Heated Exhaust Gas Oxygen
In order to completely answer this question you would need to provide some additional information. Do you know what code(s) were in the system prior to the sensor being replaced? Was it a hego (oxygen) sensor or cat monitor sensor that was replaced. In most cases a hego sensor will not be the culprit. These sensors usually get replaced mistakenly because there is a rich or lean code for that bank (side of engine). A rich condition could be caused by a leaking fuel injector and a lean condition could be caused by a vacuum leak or a stuck closed injector. Hego sensors do go bad. If they fail to read the oxygen content in the exhaust it will through the light on. The other type of sensor failure is in the sensor heater circuit. The sensor has a built in heater that runs on 12 volts. It heats the sensor for proper operation. So again, you would need to provide more info. The dealer would be able to install a computer with software called IDS. They can monitor the fuel trims and perform certain test to determine the problem. Good luck :o)
There is no fuse for the oxygen sensor. The only fuse is for the ECM. --------------------------------------------------------------------------------------------------------- On a 1997 Ford Explorer, there is a 20 amp mini fuse for the Hego system (heated exhaust gas oxygen sensor) in location # 11 in your power distribution box in the engine compartment. THE PD BOX IS LIVE - DISCONNECT YOUR BATTERY CABLES (Helpfull)
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A HEGO sensor indicating lean at the end of a test is trying to correct for an over-rich condition. The test fails when the fuel control system no longer detects switching for a calibrated amount of time.
On a 2003 Mercury Mountaineer : In the power distribution box ( which is " live " ) located in the engine compartment on the drivers side : ( # 41 is a 15 amp mini fuse for the HEGO , VMV , CMS , PTEC ) HEGO stands for Heated Exhaust Gas Oxygen ( sensor ) You can view the 2003 Mercury Mountaineer owners manual online at : www . motorcraft service . com ( no spaces ) Click on Owner Guides ( the fuses and relays section starts on page 166 and the power distribution box diagram is on page 171 )
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