O2 sensor not coming off
The oxygen sensor on my car won't come off.
Experienced mechanics share their insights in answering this question :
I will assume you are trying to remove the sensor yourself. The location of the oxygen sensor beneath the car allows rust to take over much of the exposed metal binding some parts together. It becomes very difficult to remove fasteners. Have an experienced technician, such as one from YourMechanic, expose the exhaust pipe to a high heat source like a torch. The exhaust pipe metal will expand and allow some movement from the fastener. If this method fails, the exhaust section may have to be replaced.
How to Identify and Fix Common car Problems ?
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Yes, it`s perfectly safe to use. Despite what some of the doom-mongers are spouting on here. Yes there are better things to use but if WD40 is what you`ve got then just go ahead.
P2270 is an OBD-II generic code for the O2 sensor signal stuck lean on bank 1 sensor 2 to the engine control module (ECM). This means that the O2 sensor in bank 1 sensor 2 indicates either too much oxygen in the exhaust stream, an open circuit, or a defective sensor which causes a lean signal to the ECM.
4 Oxygen Sensor for Mitsubishi Eclipse 2006 2007 2008-2012 2.
Unscrew the oxygen sensor using
a ratchet wrench.
If you don`t have one, try using an open end wrench. Fit the wrench over the sensor where it plugs into the exhaust line. Turn it counterclockwise to loosen it, and then finish unscrewing it by hand.
MALFUNCTIONING AND FAILED SENSORS Oxygen sensors can fail when the sensor`s ceramic element is exposed to certain types of silicone compounds or when an oil-burning engine leads to the sensor becoming oil-fouled. Also, a small amount of tetra-ethyl lead in the gasoline can kill an oxygen sensor.
When the air/fuel ratio is perfect and the fuel mixture is 14.7:1 (stoichiometric), the sensor will generate approximately 0.45 volts. This is difficult for the engine controller to achieve. On a normal operating O2 sensor you should see the voltage bounce around quite a bit from rich to lean.
O2 sensors that are failing tend to read lean, which causes the fuel system to run overly rich to compensate. The result is increased emissions and fuel consumption. The engine computer needs to know what the fuel mixture is with a high degree of precision so it can optimize fuel economy as well as emissions.
The oxygen or lambda sensor is one of the most important and one of the most misunderstood components of a modern fuel injection system.
Do I need to replace all of the sensors at once? It is best to replace O2 sensors in pairs. For example, if you replace the downstream left sensor, you should also replace the downstream right.
When a developer or user enables Sensors off in developer options (Settings > System > Developer options > Quick settings developer tiles), a new tile appears in the quick settings tray. They can use the tile to prevent apps from accessing the camera, microphone, and all sensors managed by the SensorManager class.
Driving an automobile with the oxygen (O2) sensor unplugged is technically conceivable, but it is not advised. The engine control module (ECM) uses the O2 sensor`s data to regulate the air/fuel ratio in the engine and to modify the fuel injection and ignition timing for optimum performance.
Unscrew the oxygen sensor using
a ratchet wrench.
If you don`t have one, try using an open end wrench. Fit the wrench over the sensor where it plugs into the exhaust line. Turn it counterclockwise to loosen it, and then finish unscrewing it by hand.
Apply a small amount of anti-seize to the threads and hand-tighten the sensor in the exhaust bung, being careful to keep the tip away from the sides. Use the sensor socket to tighten the O2 sensor to three-quarters turn past finger-tight, depending on the manufacturer`s recommendation.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
check engine light O2 sensor already replaced same codes still popping up after replacing old O2 sensor
ANSWER : Hi there. What you received from the parts store was a code retrieval, not a diagnostic. The codes are set when a fault is detected against normal operating parameter. The computer does not know what caused the fault, only that the fault meets the criteria for this code to set. There could be a problem in the wire harness, converter, or the ECM. The code and data are needed to properly assess the direction that a diagnosis needs. I strongly suggest having a qualified technician perform an inspection to avoid replacing unnecessary parts. Your Mechanic has several available technicians that can assist you with a check engine light inspection.
Check Engine light comes on, mechanic replaced o2 sensor but light still comes on.
ANSWER : Hi there:
If the mechanic completed the O2 sensor replacement, reset the codes and the error code was triggered again, it is possible that the catalytic converter is damaged and needs to be replaced. However, it’s also very common for the electrical harnesses that power these sensors to become frayed, damaged or faulty; which can also trigger the check engine light. It’s not advisable to drive a vehicle with a damaged catalytic converter for extended periods of time, as it can cause damage to internal engine components.
Diagnostic code read o2 sensor bad, replaced o2 sensor, cleared code but engine light came back on, is it caused by bad air filter
ANSWER : Hello there. Typically jump starting a vehicle doesn’t trigger an OBD-II error code. However, one of the most common misdiagnosis issues with the P-2270 is replacing the O2 sensor before diagnosing if there are any exhaust leaks. Obviously, you’ll want to check for the exhaust leaks first, repair the damaged component, and then clear the codes before scanning the vehicle again. Sometimes the electrical harness attached to the O2 sensor is damaged or dirty which will also trigger this error code. The noise and vibration may be an indicator of a loose exhaust pipe, which may be the source of the error code staying on. If you need any help, have a technician from YourMechanic come to your home or office to diagnose your Check Engine Light and make the necessary repairs.
So I had two codes come up for two of my o2 sensors..replaced them both and check engine light is still on…my mechanic seems to
ANSWER : Hi there:
Although it’s hard to say if there was serious damage done to your ECM during this service, it’s more likely that the stored error codes were never cleared from the ECM, and that’s why the warning lights still appear. This is a common oversight with some mechanics, but if you have a mobile mechanic complete a check engine light inspection, they should be able to clear those stored codes and determine if further damage has occurred.
O2 sensors changed, but check engine light still showing code after clearing it I checked fuse. Wires are good and used Denso OE.
ANSWER : Depending on what the code was for will determine if the oxygen sensor was to be replaced. If the conditions were for a rich or lean mixture and it said oxygen sensor, then the spark plugs and wires could need replaced if its a rich reading or the fuel injectors could be clogged or not working if its a lean mixture. If the code said that the oxygen sensor was bad, then check the harness and see if there is a break in the wiring or a short to ground in the wiring from the oxygen sensor to the main harness. If you need further assistance with your check engine light being on, then seek out a professional, such as one from Your Mechanic, to help you.
i need to replace both o2 sensors for vehicle listed above. so is it front left and back left o2 sensors?
ANSWER : Hi there:
Typically when an issue comes up with O2 sensors, it’s either the front bank (before the catalytic converter) or the rear bank (after). It’s very rare that all need to be replaced. However, the quickest and most effective way to determine which is faulty and need to be replaced is to have one of our professional mechanics complete a check engine light is on inspection. This service will allow them to determine which one is bad, and if you’d like, we can replace that O2 sensor for you.
CEL for O2 sensors keeps coming on.
ANSWER : Hi there. To be completely honest, without inspecting your harmonic balancer installation or the vehicle itself, any "guesses" would be exactly that – an educated guess. Usually these p0140 codes indicate a problem with the O2 sensors, either being too lean, too rich or not receiving or sending data. In many cases, the codes are caused and triggered by the electrical harnesses attached to each sensor as opposed to the sensors themselves. You may want to replace the electrical harnesses and clear the OBD-II codes with a professional digital scanner or have a professional mechanic come to your location and help you diagnose this issue.
I got the code P0133, 1/1 sensor voltage is weavering at about .7 v, and left side of engine running rich.
ANSWER : Hi there. Check the wiring to the oxygen sensors and see if they are broken or shorted to ground. If the wiring looks good, then check the mass air flow sensor (MAF) and see if the MAF sensor is dirty, the harness is not plugged in, check for any open air inlets between the sensor and the throttle body, or if the sensor is working properly. If the sensor is not working properly, then I recommend replacing the MAF sensor. If you need further assistance with your engine running rich, then seek out a professional, such as one from Your Mechanic, to help you.
