Sensor problem... I really need some help here... no one knows the answer...
My check engine light has been on for quite some time now. probably about 6 months. when the light first came on I had the code read and it came up as the o2 sensor. (the one before the cat converter). I changed the sensor and the light went out for a couple weeks. but then it came back and had the same code. I took the car to my regular mechanic and he said that code can be multiple things. he messed around with some wires on the map sensor and once again the light went out for a little bit, but it came back. I'm clueless and everyone else seems to be to. if you have ANY idea what the problem could be please help!
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Re: sensor problem... I really need some help here... no...
I would replace the O2 sensor again,and it should be replaced under warranty,as most parts have at least a 1 year warranty.If the exact same code came back again,for the exact same O2 sensor,then the next step in the diagnostic route (every trouble code has a diagnostic route) is to ohms check the wires for that specific sensor between the sensor and PCM (Powertrain Control Module) for continuity.You are looking for any problems with the wires,or the connectors,involved in the circuit.If the sensor checks out,and the wires check out,then the only thing left is a problematic PCM,which might be able to be reflashed so that it is less sensitive,and less prone to set a "check engine" light and diagnostic trouble code.Reflashing is basically just reprogramming the vehicle's engine and trans computer/controller.Good luck,and t/y you for your service to our great nation.
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There are a lot of "fuel sensors" in the car, or codes relating to issues with fuel pressure, etc. So your question does not provide enough information to provide a helpful answer. Repost your question and provide the exact code (for example, P0087) in addition to the year, make, model, and engine size of your vehicle.
If the check engine light is not flashing, and the engine is still running normally, it's probably OK to drive for a short time, but be aware that it may quit running at any time. Have it checked out and repaired as soon as you can.
There are several different sensors in most cars. Some don't really "go out", and some do. To give you a useful answer, we would need to know the make/model/year of your car, and which sensor you were really asking about...
In general, you will see a "check engine" type of light if something that can be replaced goes out.
This may sound like a really simple answer to your problem, but I'd suggest you check the gas cap. A lot of times when your Charade is moving around the gas load will shift in the tank causing pressure changes which register on the electronic sensors as an engine fault. If you tighten up the gas cap, you restore the fuel system's pressure balance and the light shouldn't go on again. Since the early 1990s, auto fuel systems have to be sealed so that the emissions controls work correctly. If the gas cap is not tightly turned down, the system reads it as a fault and the engine light or check engine light goes off. That should solve your problem. One last note, you don't really say whether there are any other problems occurring like bucking or misfiring. Does this occur at any time? If it does, let me know and I'll find the answer to that problem. If you want more information about cars you might look at www.safecar.info where you will find a wide range of information including car repair hints.
Any auto parts store should be able to scan the computer for trouble codes. If the check engine light is not on you probably don't have any stored codes. The O2 sensor monitors the exhaust gas to find the level of unburned fuel. The computer takes the data from the sensor and adjusts on time for the fuel injectors.
It definitely sounds like the O2 sensors. See if you can get them replaced and see what happens. Remember that there are 2 O2 sensors; an upper and a lower. The upper one will probably be on the top of the engine where the air flow breather goes into the engine. The lower one will probably be on the bottom of the engine actually on the tailpipe itself close to the firewall. I had to replace my O2 sensors in my car, whenever I would stop at a red light it died. I hope this works, it stinks not having a ride, I know.
Don't know if this will answer it. O2 sensors send info to the computer to make adjustments to the emissions system. Over time the O2 sensors fail which cause the computer to light the "Check engine" light. Originally the "Check engine" light was dedicated to an emission system fault. Now manufactures use it for a variety of abnormalities. To know what the "check engine" light means you have to either take it to a mechanic or buy a OBDII scanner (around $100) and read the code yourself. I like to read my own codes. These scanners are good for all modern cars. Instructions are included EZ to follow.
Long story short, don't worry about it the check engine light will come on when O2 sensor fails. Happy motoring!
Is the check engine light on? probably is ... A lot of answers to this . If ck engine light take to autozone to get the codes or some where. Autozone does it 4 free...Tune up needed ...replace spark plugs wires..mass air flow sensor..fuel filter...air filter...bad gas..Good luck
Oxygen sensors are located on the exhaust pipe in front and behind the catalytic convertor. There are more than one. If your check engine light is on, the code will tell you which sensor is faulty - I need that code to tell you the exact location.
Also really need to know the engine type to be more specific.
If your heat is not working there is probably a fault in the door mechanism that lets air pass over the heat exchanger under the dash. the switch is most likely at fault.