Will disconnected wires from the o2 sensor cause the car to die it was a blue wire and a black wire
I was driving and the whole exhaust fell off from in front of the catalytic converter back and I tried to limp it home just when I pulled into the driveway it died but the only thing I could see wrong was 2 of the 4 wires to the o2 sensor got unplugged a blue wire and a black wire ???
My car has 144000 miles.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
There is not a blue wire going to the O2 sensor but a blue wire going to the camshaft sensor. Any bare wire that goes to the computer may cause the computer to get shorted and stall the engine. I would have the wires repaired along with the exhaust falling off and then check all the fuses to see if some of the fuses were shorted from the bare wires. Once all fuses are replaced that were bad then see if it will start. Have a mechanic diagnose the problem for you if you need help.
How to Identify and Fix Common car Problems ?
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If you remove your downstream O2 sensor, the system for emissions control might not work properly, and your car could emit more pollutants than permitted by law. This means that your vehicle could fail the emissions test and need to be repaired to be able to pass.
The short answer is yes, a faulty oxygen sensor can make your engine stall or backfire. It`s recommended you have this sensor changed sooner than later. Not dealing with the bad sensor can damage other parts of your vehicle`s engine. To address this problem, head to your auto repair shop.
Will a bad O2 sensor cause rough idle and loss of engine power? You bet. Moreover, you may also notice poor acceleration, engine misfires, and even stalling. Bad oxygen sensors disrupt all kinds of essential engine functions, including engine timing, combustion intervals, and air-fuel ratio.
Yes, you can drive with a bad oxygen sensor if you can still start your engine and feel little difficulty driving. But don`t leave it alone for over a couple of days, as it might cause safety problems and lead to the malfunction of other parts of your vehicle.
The role of the downstream sensors is to monitor the output and health of the catalytic converter. Removing them will take away this function, and produce a CEL (check engine light) or MIL (malfunction indicator light) on the vehicle.
It is a good idea to let your car sit with the battery disconnected for at least half an hour, this will reset the computer allowing your O2 sensors to not have to work against the PCM.
A functional O2 sensor will be an essential cog for a consistent running vehicle. Still, a bad oxygen sensor will most likely cause bad fuel economy, bad smells in your car, and tamper with your engine`s performance ability.
Faulty Sensors – last but not least, it could be a bad sensor. If you see the “check engine” light, one of your sensors might be bad, like the mass air flow sensor, which measures air entering the engine and adjusts the idle speed. If it`s off, your engine could die.
The Mass Airflow Sensor (MAF) measures the amount of air the car needs to accelerate. Once it gets that measurement it sends this information to the ECU which notifies the throttle to open accordingly. If the MAF is faulty and not measuring the airflow properly then you could experience a serious loss in power.
Moreover, even though you think that your car will be more powerful, this won`t last as the catalytic converter will have a higher risk of getting clogged. On top of that, you will spend more money, as unplugging the lambda sensor will increase your fuel consumption by approximately 15%.
The O2 or Oxygen sensor works like a tiny voltage generator. It actually produces a voltage in the theoretical range of 0.01 to 0.98 volts.
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.
You don`t “reset” the computer. You just clear/erase the memory code and all is well in the world. If the repair was done properly the check engine light will stay off unless there is another concern.
O2 sensors were introduced mainly for emissions regulation, trying to keep them as low as possible. So the answer is no, they are not absolutely needed for engines to function properly if they would designed to run without one.
Parasitic drain
Usually, it`s a faulty accessory in the car causing the drain – for example, a sensor or interior light doesn`t switch off automatically. The accessory will keep consuming power until it`s manually switched off.
A malfunctioning sensor or actuator can cause the car computer (or transmission) to receive signals with the wrong voltage amount. This can cause the computer to lean the air-fuel mixture, which results in a loss of power for your engine or transmission.
Bad Sensors
One common culprit for this problem is the crankshaft position sensor, which measures the position and speed of the crankshaft. The computer uses the information from this sensor to know when to fire the spark plugs. If the sensor isn`t working, the spark plugs won`t fire, keeping the engine from starting.
Without sensors, there will be no IoT. Why are sensors so important to IoT? Sensors read real time information, which translates into data. This data will be translated into knowledge, and follow-up actions can be taken.
The oxygen sensor problem is the number one reason cars are slow to accelerate. The oxygen sensor is responsible for monitoring the air-to-fuel ratio in the engine, and over time it can become dirty or damaged, which will decrease power. Oxygen sensor malfunction will result in a mixture being too lean.
The most typical causes of a car not accelerating while driving include a faulty sensor, contaminated fuel or air filters, or a faulty timing belt. Generally, this isn`t something you should ignore.
The ECU is a control system that uses feedback from the sensor to adjust the fuel/air mixture. As in all control systems, the time constant of the sensor is important; the ability of the ECU to control the fuel–air ratio depends upon the response time of the sensor.
Each oxygen sensor has its own unique characteristics specific to its application. One generic oxygen sensor that may appear to be the same cannot be used to replace a range of these specific oxygen sensors.
No. The O2 sensor is needed by the fuel injection computer to determine the amount of fuel to deliver to the cylinders. Without it, the engine may run rich which wastes fuel, pollutes, and will damage the (expensive) catalytic converter.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
Will disconnected wires from the o2 sensor cause the car to die it was a blue wire and a black wire
ANSWER : There is not a blue wire going to the O2 sensor but a blue wire going to the camshaft sensor. Any bare wire that goes to the computer may cause the computer to get shorted and stall the engine. I would have the wires repaired along with the exhaust falling off and then check all the fuses to see if some of the fuses were shorted from the bare wires. Once all fuses are replaced that were bad then see if it will start. Have a mechanic diagnose the problem for you if you need help.
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.
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.
I filled my car up with gas, drove about a block to get a newspaper, put it in park and it died before i ever got out of the car .
ANSWER : With a car that cranks but won’t start, there are a few things that need to be checked. But before I explain them, there is a common thing that happens with Nissan’s. Every once in awhile they will flood the cylinders with fuel and wash the oil film off the cylinder walls and rings. This will reduce compression enough that the car will not start. Fortunately, there is an easy fix for this problem. It is what is known as clear flooding.
Hold the gas pedal all the way to the floor while cranking the motor. It won’t start immediately and when it does it will not run very well at first. Feather the throttle to keep it running until the motor clears out the excess fuel and the motor begins to run smoothly. If after cranking the motor with the gas pedal held to the floor for at least
Car died while driving so I replaced the alternator and battery and car won’t attempt to turn over. What else could it be?
ANSWER : The initial failure was likely caused by a sudden fuel system (e.g., failed fuel pump) or electrical (including ignition) faiure. Prior to performing diagnostics be sure you have a fully charged battery that passes a load test. Then, confirm that the engine immobilizer system (security system) is not activated thus preventing the car from starting. If the starter motor is not functioning, check for power to the starter motor when the key is held in the "start" position. If there a large voltage drop at the starter motor or no power at all, you may have a faulty ignition switch but you do have to check out the entire starter circuit, which includes grounds, wiring (some of which is very heavy cabling), fuses, relays, the ignition switch and terminations. On the other hand, if the starter motor is getting power but the starter doesn’t work, then the starter is condemned and replaced. If you desire that a certified mechanic resolve this, please simply request a no start diagnostic and the responding certified mechanic will get the problem diagnosed and repaired for you. Please let us know if you have further concerns or questions as we are always here to help you.
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.
Map sensor car won’t start up good ?
ANSWER : Your MAP sensor is an important input for your computer. It helps determine the load on the engine to calculate the correct amount of fuel to inject. It sometimes takes a few seconds for the vehicle to realize that the sensor is not producing a good signal.
At that point, it will use other methods to determine the fuel rate, such as pre-programmed fuel maps, throttle position, etc. I would suggest replacing the MAP sensor and retesting. If you would like to have it checked first, a certified technician from YourMechanic will be able to scan your vehicle and test components to determine the root cause of your starting issue before making a repair.
