My car has 8 codes all related to oxygen sensors
The guy at Autozone said most likely solution was to repair oxygen sensor o2 wording. We have looked at all the sensors and wires and can't find any bad. So what should our next step be. And it also buck and jerks when driving. It sometimes cuts of when backing up.
My car has an automatic transmission.
My car has an automatic transmission.
Experienced mechanics share their insights in answering this question :
The first thing to do is to document all the codes you have in memory. Have the codes cleared and then road test to see if any codes come back right away. Sometimes you could get bad fuel that can cause multiple codes like this. Clearing the codes and seeing if the codes return to get a complete diagnosis. Have a mechanic like one from YourMechanic do the pinpoint tests for any codes that return and then a repair can be done.
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An oxygen sensor that reports a lean fuel mixture, for example, will certainly set off a code. This sensor is doing its job and does not need to be replaced. If a failing or dead sensor is the issue, there are several OBDII codes in particular that will be set off (more on this in the following section).
Yes. While the damage may seem small initially, the longer you drive with a bad oxygen sensor, the worse the damage will become. Eventually, you may experience rough idling, poor acceleration, engine misfires, an illuminated check engine light, and failed emission tests.
Over time, an oxygen sensor may become caked with byproducts of combustion, such as sulfur, lead, fuel additives, oil ash, etc. This contamination causes the sensor to lose its ability to produce voltage and send the right signal.
Once the oxygen sensor stops performing as intended, the vehicle computer detects that and turns on the Check Engine light. This will usually have a diagnostic trouble code (DTC) of P0138. Typically, you`d take the vehicle into the shop, where they`d diagnose the issue and replace the oxygen sensor for you.
A P0420 code is set when the upstream sensor and the downstream oxygen sensor sense the catalytic converter is not doing its job. Basically, the amount of oxygen going into the converter is not being burned, and it detects it through the downstream sensor.
Since catalytic converters have limited oxygen storage capacity, the rear O2 sensor will detect the excessive oxygen and generate a converter efficiency code. Leaks in the exhaust system can affect oxygen storage in the converter and lead to improper O2 sensor readings, affecting the air/fuel ratio (AFR) balance.
So why is the light still on? Here`s something you probably don`t know: after clearing the car`s computer you will need to drive for about 50 to 100 miles. As you drive your car the computer will monitor all the sensors and register the results.
Yes, a bad spark plug can confuse your car`s internal computer and trigger the O2 sensor code.
The P0130 code is an OBD code that is triggered when the Engine Control Module (ECM) fails to detect any activity from the oxygen sensor that is located on the Bank 1 side of your motor and exhaust system.
A simple test using the scanner to see if the O2 sensor is capable of reading correctly while monitoring the O2 voltage is to make the fuel mixture artificially rich by feeding propane into the intake manifold or tapping the accelerator several times quickly. You should see the O2 voltage go high, or rich.
Driving your car with the P0420 code will only lead to further damage to the catalytic converter. Plus, the problem can affect other parts of the car, such as the fuel line and exhaust systems. This is why it`s important to actively monitor your car`s catalytic convertor to avoid other costly repairs.
Can spark plugs cause P0420? P0420 denotes either an issue with the oxygen sensors or a fault with the catalytic converter that reduces its efficiency. So, yes, it`s possible that a defective plug is enabling unburned fuel to enter the cat and causing damage to it over time.
The code P0420 can be caused by the catalyst, O2 sensors before and after the catalyst. If both O2 sensors and catalyst was replaced then you may have an exhaust leak at the manifold or pipes.
Most catalytic converter failures fall under one of three categories: Overheated, melted or broken converters.
Yes, you may be able to fix P0420 yourself. Depending on the cause of the code, the diagnosis and the repair might be simple or might be very difficult to do at home. You might need access to a welder if you need to patch an exhaust leak. You might also cause more damage trying to repair your problem.
In most cases, successfully repairing the issue that caused your light to come on will cause the check engine light to turn off automatically—but only after 10 to 20 “cycles”. A cycle, in this instance, refers to the process of turning the vehicle on, running it for some time, and turning it off again.
A dirty air filter can cause your vehicle to throw a Check Engine code. During this instance, the Check Engine Light of your vehicle will turn on. The light turns on because your vehicle is sensing that its engine isn`t receiving enough air.
You probably know that the answer the questions is — no! A P0171 or P0174 lean code with an O2 sensor reading lean all the time mean — well, several things. The real problem may not be a bad O2 sensor, but possibly be an engine vacuum leak, low fuel pressure or dirty fuel injectors that are causing the engine run lean.
Can a bad O2 sensor cause a P0300 code? Yes. As it is one of the most vital inputs to your car`s computer for fuel control, a sensor failure can result in an incorrect air/fuel ratio. In addition, it can lead to engine misfiring and set code P0300.
Relevant Questions and Answers :
the most relevant questions and answers related to your specific issue
Does a bad oxygen sensor make the car slower when in full throttle ?
ANSWER : Hi there. It depends on whether or not you are racing your friend on a NHRA sanctioned Drag Strip or illegally on the street as to whether or not the O2 sensor is causing you to be slow. If you’re racing on the street, the O2 sensor is fine and has no impact. If you are racing on the drag strip; yes – a faulty O2 sensor will cause poor engine performance, reduced fuel economy and other problems. Two pieces of advice from a Licensed NHRA Drag Racer, first, KEEP IT ON THE TRACK; not the street. Second, have a professional mechanic complete a check engine light inspection to tell you what O2 sensor is faulty, have it replaced and reset all error codes.
Read Full Q/A … : My car has 8 codes all related to oxygen sensors
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.
Read Full Q/A … : My car has 8 codes all related to oxygen sensors
I had a p0405 get code replaced egr valve, map sensor,mad sensor, and PCv valve just to be safe but still getting the code why?
ANSWER : The code P0405 and a rough idle is most likely due to carbon getting into the EGR pintle. This will hold the EGR open. When you are getting the rough idle you should shut off engine and remove EGR valve. Check to see if carbon is holding the pintle open. If it is then you will have to remove the carbon from the pintle. Then try and clean out the EGR passages by scrapping them using a round wire brush. Afterwards, start the engine for a few seconds with valve removed to blow out loose carbon. You should then spray a small amount of carbon cleaner into the passages to dissolve the carbon. Lastly, reinstall the EGR and reset the light and codes.
If you’d like assistance with this, consider YourMechanic, as a certified professional can come to the vehicles locations to perform these checks and properly diagnose your Check Engine Light.
Read Full Q/A … : My car has 8 codes all related to oxygen sensors
It threw a code 21 , throttle position sensor bad code. i replaced it and the code went away but i still have no spark.
ANSWER : Hello and thank you for contacting YourMechanic. The problems that you are encountering with your vehicle, could be caused by the harness to the Throttle Position Sensor (TPS) or the computer itself.
Check the harness to the TPS for any debris or any corrosion. Hook up a paperclip to the harness and turn on the key. Use a multimeter and check for voltage at the pins of the harness. Make sure that the ground on the sensor is grounded and has no resistance. If you find that the harness is having too much resistance, then I recommend having the main engine harness replaced. If you have replaced the harness and still have the same problems, then the computer will need to be flashed or replaced.
I recommend having a professional, like one from YourMechanic, come to your home to diagnose your car’s no start condition before replacing any parts.
Read Full Q/A … : My car has 8 codes all related to oxygen sensors
Can i retrieve CEL code from car … forgot what code it hade in my car .. put headgasket sealer and i erase the code ..
ANSWER : Once a trouble code is erased, it cannot be retrieved. The engine controller does not have a "recycle bin" like they have on Windows. If the car still has a problem, the code will come back up after some driving. However, the controller will not turn on the CEL until it has seen the malfunction on two separate "trips." A "trip" is a driving cycle where the car is started cold, driven until it is fully warm and through a certain number of accelerations, and shut down. So you might not see the CEL for a couple of days. As for the "head gasket sealer," I wouldn’t hold out too much hope of that solving a problem. At the very best it might put off the symptoms for a short while. If you need help interpreting codes that come up, or solving a head gasket issue, contact Your Mechanic. They can send a technician to your home or office to read the codes on your car and help you decide what to do.
Read Full Q/A … : My car has 8 codes all related to oxygen sensors
Service engine warning, MAF code and O2 sensor code, along with check suspension light are turned on
ANSWER : Hello, it sounds like you have quite a few things going on. I am going to do my best to break them down for you.
First if the engine is very loud when idling and the belt has already been replaced, there may be an issue with the tensioner or idler pulley.
Next, the Navigator is known for needing service to the air suspension system as it gets up in miles, the most common causes of these are the air struts themselves have failed, or one of the air lines has a leak.
Lastly, if the O2 sensor and MAF are continually coming back after the sensors have been replaced, the most common cause would be either an exhaust leak or a vacuum leak.
Qualified technicians such as the ones at YourMechanic will be able to diagnose these issues and recommend the best path to repair, starting with a diagnosis of your warning lights.
Read Full Q/A … : My car has 8 codes all related to oxygen sensors
My code reader says I have a bad mass air flow sensor ans crank shat sensor test drive ran better shut off & engine Lt. Same code
ANSWER : Hi there. The problem you are describing, sounds like you may have a poor connection in the connector at the mass airflow sensor. Although, sometimes aftermarket parts do not perform as well as factory (OEM) parts. Check for corrosion and/or wide spacing in the terminal ends. Compare the terminal ends in the connector using a flashlight to see better. The terminals can be tightened. If you are not comfortable with doing that, a replacement pigtail (connector) is available. You vehicle may require further diagnosis performed with a scanner that provides parameters that can be viewed as the fault occurs. If that is the case, I recommend having your vehicle’s electrical circuits inspected in order to pinpoint the underlying fault.
Read Full Q/A … : My car has 8 codes all related to oxygen sensors
the oxygen sensors poped up after i got a jump for my car but i kelp cranking it ova and ova again an forgot to put fuel fuse in
ANSWER : Hello. From what you describe, it would appear that your vehicle may be experiencing more than one issue. The first thing I would do is make sure that all the fuses are good and installed in the correct locations and see if that helps the issue. Next, I would see if the Check Engine Light is on, and retrieve any trouble codes if it is. The trouble codes will likely reveal some information as to what the issue may be. If you haven’t driven the car in 2 months, keep in mind that the fuel may have gone stale and is no longer suitable for combustion. If you want to have this diagnosed, a certified professional from YourMechanic can come to your car’s location to inspect the hard start and help perform repairs to get your car back on the road.
Read Full Q/A … : My car has 8 codes all related to oxygen sensors
