What walk it average when the company engine shortly light comes on in your can and also how do I reset it? learn what is wrong v your vehicle and also how you deserve to repair that from an competent mechanic.

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Car manufacturers install organization engine shortly lights into cars to simply let the vehicle owner know that there is other that requirements to be viewed on their car. Over there are plenty of systems on your auto that space monitored by her cars computer. When the computer system notices a problem in among these systems it will rotate on this light to let the auto owner recognize that they have to take it to your mechanic.

Flashing company engine quickly lights deserve to be really confusing. What carry out they mean? are they important? What should you do around them? just how do you turn them off?

Drawing native my year of suffer as a mechanic and also questions that I obtain from mine readers, ns have listed the typical problems and also solutions below.


If you still have any kind of unresolved automobile problems or questions, you deserve to ask one auto mechanic online. For professional answers certain to your vehicle"s make and also model, i recommend JustAnswer Car. They have a large pool the certified mechanics come answer your questions for a little fee and you can also browse your answers to various other users for free.

Reasons Why service Engine quickly Light come On

To troubleshoot, repair and also maintain her vehicle, you"ll need diagnostic and also repair information that is specific to your automobile or truck. Because that this ns personally use and recommend ALLDATAdiy. With full manuals for over 30,000 vehicles online, you will find an accurate match for her vehicle"s year, make and model.

Besides gift cheaper than a manufacturing facility manual, they also offer step by action repair instructions and detailed diagrams past what is found in many printed manuals. Click below for a sample of your diagnostic and repair information.

Cylinder 1 Misfire, service Engine Soon

I have a 2004 Mustang 3.8L V6. I have actually been having sputtering lately and the organization engine soon light came on and also blinked twice and also then became solid.

I acquired the password checked and it was cly. 1 misfire. I have because replaced plugs/wires and included Seafoam just in situation it to be a dirty injector.

When I changed the plugs/wires the sputter got much lot better. It doesn"t execute it when driving now (it was before the adjust of plugs/wires). Now it only does that while idle favor at a prevent sign/red irradiate or sitting still. It got a bit far better after the Seafoam treatment too, yet the light is tho there and the sputter is tho there. I also noticed my RPMs autumn while i was rolling under my home window (power windows).

This has me thinking that the difficulty is electrical and not mechanical. I have actually not excellent a compression test (do not understand how/what precisely it is) and I am praying its no a head gasket. Please help!

Answer: hello Jason. Thanks for questioning me her question. Over there are numerous things the can cause a misfire. Since you have already replaced the spark plugs and wires the will aid narrow the down. It can be a problem with a weak ignition coil because that the #1 cylinder. The could also be an injector the is leaky or faulty. That is also possible that the compression is short on the cylinder.Compression exam are relatively easy. Basically you eliminate all the spark plugs, climate thread a compression tester into the cylinder you want to test climate crank the engine and see what the gauge says. If that is low it is probably due to the fact that of a valve problem or worn rings.It is feasible but unlikely the this problem is caused by a bad head gasket. If the head gasket is the culprit, there should be countless other symptoms together well, with the key one being overheating.

Your business engine soon light will revolve off after ~ you get this difficulty fixed.

Vehicle Shakes, business Engine soon Light On

The company engine shortly light in my car comes on and off and my car shakes a little. I believed It may need part balance or something. Why execute you think my service light comes on and off? other than a little shaking it appears to be running well. Give thanks to you!Answer: Hi, Sergio. Thanks for questioning me her question. The many likely reason of her shaking and also your organization engine soon light is a cylinder misfire.The very first step is to number out the trouble code through an OBD II scanner. Additionally you can take your automobile to one auto parts store and they will be able to read the codes to you. Most of them carry out this together a complimentary service.

After you understand the code you can come ago to mine website and also do a search for it. There room many reasons of misfires yet some that the typical ones that ns see room spark plugs and/or wires, ignition coils, ignition control modules, short fuel pressure, faulty fuel injectors, etc. It will certainly take some trial and error by a professional technician to figure out why that is happening.It is crucial to acquire this taken care of because every one of the extra fuel going into the catalytic converter can reason it to go bad and also they are usually reasonably expensive.

OBD code P1100, business Engine Soon

What is code P1100 on a 1995 Chevy S10 pickup with the 4.3L motor?Answer: This code is because that the MAF or Mass airflow Sensor. This is the definition for code p1100: P1100 MAF Intermittent.The most likely reason of your organization engine quickly light is one of two people a dirty MAF or loosened wiring or connector. If you want to clean it just buy some call cleaner and also spray the onto the MAF wire. Be very careful as this cable is an extremely fragile.If this walk not aid then you will certainly probably have to get some professional help as it could be a pretty tough diagnosis.

OBD password P1105, service Engine Soon

Back in November of last year, an auto mechanic changed the O2 condensor on my car. They had actually some problems getting come the component and make the adjust and claimed they believed they gained it tight.

I have had actually problems due to the fact that then. Now my car is absent badly and also just last week an error code 1105, i beg your pardon is the fuel pressure selnoid. Likewise my service engine soon light is on. They claimed the O2 difficulty has naught to execute with this problem and refuse to examine out the O2 condenser.

I arrangement to have someone rather look at it, yet need to recognize if a poor exhaust system would reason the password 1105 or if the O2 condensor isn"t in ideal would this reason the problem. Ns don"t desire to replace the fuel push solnoid if it might be one of these. I haven"t had actually the exhaust change since purchasing and understand (looking in ~ website info) that the manifold has something to carry out with the fuel press solnoid.Thanks, Karen (1998 Mitsubishi Eclipse GST)

Answer: hello Karen! thanks for asking me your question. This code can cause your business engine soon light come come on.

I"m not sure but I think you average "02 Sensor". I have never heard of an 02 condenser. Either way, this sensor probably has actually nothing to execute with the existing code the you have because it is in a completely different mechanism than the O2 sensors.The code you are having is created by the cars computer system when the does not watch the fuel pressure manage solenoid valve working correctly. Most likely it is just a problem with the solenoid and also it requirements replacing, yet it can be various other things favor wiring or vacuum problems.The exhaust manifold has nothing to perform with the fuel pressure solenoid. But the input manifold does due to the fact that this is whereby the vacuum originates from that help to run the solenoid.It is a good idea to have an additional shop check your auto out simply to be sure that this has actually nothing to carry out with the job-related that was previously done, however it sounds choose it most likely does not.

Sulfur Smell, company Engine shortly Light

I have a 1997 Toyota 4runner 3.4 V6. My business engine quickly light recently came on and my exhaust has actually been more pungent than normal. Likewise on occasion the automobile produces a sulfur (rotten egg) smell... Any type of ideas?

Answer: many thanks for asking me her question. There are quite a few things the can reason this kind of problem. The very first thing the you must do is have actually your codes review with an OBD II scanner. After ~ you know what the codes space you will have a much far better idea that what could be going on. Friend can additionally search because that the password numbers on mine website or on the internet to view what might be causing them.The sulfur smell or rotten egg smell that you are acquiring is probably due to too much unburned fuel being put right into your exhaust system. In other words her engine might be running rich. That is regular to odor this smell some as fuel has sulfur in it, yet if you have actually not smelled that before and also your examine engine irradiate is top top then, over there is most most likely a problem somewhere.

Sometimes simply the means you drive deserve to cause an ext of a sulfur smell. If you drive a many of short trips or execute a many aggressive acceleration friend might an alert the rotten egg smell more. Some brands that gas have an ext sulfur than others too, for this reason the form of fuel the you placed in your auto will also impact it.I think as soon as you gain the password figured out and also repair every little thing is bring about it your funny smell must go away as will your company engine soon light.

Service Engine shortly Light comes On and Off

My automobile has a high idle, then it feels favor it"s going to stall and also radio goes off then earlier on. I had diagnostic done yet nothing has actually come up. The business engine shortly light come up then turns off. Any kind of advice? (2002 Pontiac Firebird V6)

Answer: thanks for asking me her question. If the service engine soon light has actually come on (even if the is turn off now) it will certainly have set a code. This would be the an initial thing that I would certainly check. The code that is collection will offer you and also idea the what could be bring about the problem.I don"t recognize who you had to the "diagnostic" yet if they couldn"t obtain the code then I concern whether they knew what they to be doing. Any kind of time the engine light comes on there will be a code. Occasionally it will be stored in history, yet it will be there uneven there is a problem with the computer.There space many, many things the can reason this problem. After you gain the code through an OBD II scanner, you can search my site or the internet for the root causes.

Car operation Fine, organization Engine shortly Light On

What is resulting in the inspect engine irradiate to which 2000 Ford explorer Sport?

Answer: thanks for asking me her question. The reason that your organization engine shortly light is top top is because your computer has discovered a problem in one of the systems or circuits of your car.

Most auto parts stores and also many repair shops will check out the codes for free then you can come earlier to mine website or find the internet to find out what the causes might be. Also though your vehicle seems to be to run fine, there might be something that is wrong the is causing damage. That is essential that you know what is walking on for this reason you deserve to repair the if needed.

Rough Idle, arbitrarily Misfire Code, inspect Engine Soon

2001 Mitsubishi Eclipse-2.4L on a cold morning, the starts and idles at about 1300 because that a few minutes til it"s warmed up, climate idles under to a 100 yet doesn"t stall out. Whilst steering it seems to run smooth til friend stop, then the rpm needle bounces all over the location (only to go under to 100 again-car shakes prefer a leaf.) A couple of times, as soon as pressing the gas pedal, it will certainly rev up, yet go no wherein or simply jerk. :(

The dash says business Engine Soon and it"s thrown an EGR Valve password then a "Random Misfire Code". Ns have adjusted out the IAC already. Any type of advice would be considerably appreciated! :)

Answer: many thanks for asking me her idle question. The most likely reason of your trouble is that the EGR valve is sticking open causing your automobile to misfire and have a yes, really low idle. That is feasible that the is other things, however this is the most most likely cause.Any great auto repair shop should be able to diagnose this trouble without too much trouble. This would be difficult to diagnose yourself however if girlfriend are good with cars and also have the tools you probably could.

Cylinder 6 Misfire, company Engine Soon

My truck has actually 120,000 miles. Cylinder #6 is misfiring every time. Organization engine soon light is on. When I crank it, for the first few seconds, that sounds like it does no miss, then it starts missing and does not prevent until I turn the engine off. I checked the compression at idle and it proved 60 psi. I additionally checked cylinder #2 and it showed about 65 psi at idle.

I additionally checked cylinder #2 and it showed around 65 psi at idle. I checked the spark and I am acquiring spark indigenous every cylinder. I have actually 3 coil packs. I likewise switched the coil package to view if one was putting much less power out than the others and nothing changed. Also, when I had actually the compression tester top top cylinder #6, after ns was excellent checking the compression, I propelled in the release valve and smelled gas.

I have spark, gas, and also compression. What can the trouble be? (2003 Toyota Tundra 3.4 V6)

Answer: many thanks for asking me her question. The an initial thing you need to do is re-check the compression. If you confirm it through the truck running it would have provided you incorrect readings. To execute a compression test you need to make sure the engine is warm, then remove all of the spark plugs and also coil packs. Then revolve the engine over through the throttle broad open while reading your compression tester.The reason that you have to redo this test is due to the fact that your truck should have actually a MINIMUM that 145 PSI. Ideally it would certainly be approximately 175 PSI. It must not have actually less than a 15 PSI difference between the cylinders.After you perform a compression test again if it is still low then squirt a couple of squirts of oil into the cylinders that space low and see if the reading comes up. If that does then it most likely has very worn rings. If that does not then you space most most likely looking in ~ a valve problem. Your company engine quickly light have to go turn off after you obtain this repaired.

Service Engine quickly Light comes On and also Off Sometimes

2003 Jeep grand Cherokee company engine shortly light on and also off periodically and sometimes die at avoid or idle.

Test claims something about emissions. Mechanic replaced a part, (will have to look at invoice to check out what is to be if you need to understand to assist solve problem) but still walk it. The check engine light come on because that a if then may be off a job or so. Jeep dies once in a if at stop or idling. It is a 6 cylinder. Ns think mine hubby calls that a straight six? many thanks beforehand.

Answer: many thanks for asking me your question. There are plenty of things the can reason this form of problem and without understanding what the code was that was set there is yes, really no method for me to narrow this down too much. It might be something regarded the emissions or it could also be a problem with your idle air control (IAC) valve or circuit.Judging indigenous your description I"m guessing that the mechanic changed the exhaust gas recirculation (EGR) valve hoping the it would solve the problem. This part can cause this form of problem, but it requirements to it is in tested and also diagnosed very first to be sure that is what is bring about it.I would certainly talk through the mechanic that did the work and also tell them that you either want your money ago since he didn"t settle the trouble that he stated he would certainly or a credit transaction for diagnosing and fixing the really problem. If he won"t do it climate it"s time to find another mechanic.

Car Vibrates while Stopping and also is slow to Accelerate

My 2001 Ford Mustang, V6, 3.8L, (172,000 miles) vibrates once I"m quit at red lights and also slow to advice after stops. I have had actually a complete tune up, new spark plugs and also fuel device flush and also check and also still having actually problems. The light says organization Engine Soon. The password reader was a PO302, Cylinder 2 misfire and Cylinder 6 misfire.

The fix shop claimed that they might not aid me, but thought it might be a damaged head gasket. Is this a possibility or can it it is in the wrong spark plugs (Bosch brand)? I"ve heard the this brand walk not job-related well with Fords. Help!

Answer: The very first thing you must do is find one more repair shop...one that will certainly actually do good work and care around their customers. If your auto did not have this problem before you had actually the tune up climate it is most likely something castle messed up on.The misfires room the reason for the vibration and low power. The most likely reason of this misfires room spark plug wires the were overcome or probably not seated appropriately (assuming they room the right ones for your car).It is possible but very unlikely the your car has a head gasket problem (especially if it has never overheated) or any kind of other major problems. Ns think friend will find that it is probable a basic fix if girlfriend can find a great mechanic to look at it.

Service Engine Soon, Mechanic Can"t Diagnose Problem

My 1999 Toyota Camry LE, 4 cylinder with 126,000 miles, the business engine shortly light keeps comes on.

I"ve lugged it to a really dependable and also honest repair man who I"ve supplied for years and he has, I"m told, the many expensive diagnostic device out there. I"ve brought it over there 3-4 times and after the last time he claimed that the can"t uncover what the difficulty is & why the irradiate keeps comes on. The hasn"t charged me the last 2 time after he assumed he fixed it (the second time), so I recognize he"s do the efforts to execute the ideal thing.After a job or two, the company engine quickly light goes off just to come ago on another day or two later on & stay on for a pair days. However, the vehicle seems to be running fine. I"m wondering if that is simply a brief somewhere.Is it worth trying to obtain a 2nd opinion? I"m loathe to lug it come a dealership to pay several of their exorbitant rates.

Answer: In mine opinion it would be worth it to get a second opinion if your regular mechanic cannot solve it. You can do part checking you yourself on the internet if you uncover out what the password is. I have quite a couple of codes provided on mine website and there are a many on various other websites as well.Some password are very hard to map down. It sounds prefer you have actually a good mechanic so ns don"t think he ripping you off, but if that can"t number this one out you will desire to take it somewhere that can. I don"t know just how he would certainly feel around it but you can even ask that if he knows anyone else that might have the ability to figure that out.Sometimes dealerships have an excellent diagnostic techs, but many time a really an excellent independent shop is even better.It is vital to get this repaired also though your auto is to run fine. The computer system has i found it a problem, and also most of the moment these problems will be resulting in some type of damage even that is seems to be to run well.

OBD password P0325, automobile Skips and also Bucks

My 2000 Nissan Xterra has actually a negative misfire when it gets warm. While it is cold it appears to it is in O.K. But gets increasingly worse as its warming up. Over there is no company engine soon light on. As soon as it"s running and also hot the bucks badly.

There is a P0325 code pending i beg your pardon I thought was a result of the bucking and the misfiring. Also after ns clear the codes the 0325 code will come back, ns can"t view the punch sensor bring about the bucking and also skipping. The truck has 145,000 mile on it and has been well cared for.

I installed a new set that spark plug wires thinking it could be a negative wire. A friend told me his Nissan choose up truck was doing the same thing and also said the I necessary to change the distributor. The engine is a 3.3 V6 with an automatically trans and also 4x4. Many thanks for any help. JimAnswer: The computer system uses the knock sensor come tell when your engine knocks. If it does climate the computer system will adjust ignition time to make it so the does not knock. If the hit sensor to be malfunctioning and sending the wrong signal come the computer then the computer system might be drastically changing the time which might account for your driveability problems.

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Code P0325 will not ever before go away also if you turn the company engine shortly light off because it is a consistent fault. The computer will test the knock sensor circuit often and will set code P0325 till the difficulty gets fixed.The computer system will no necessarily revolve the examine engine light on through this code because it walk not know that the signal is bad. It just thinks that there is a knock because of what the sensor is informing it.Most likely this is just a poor sensor, yet it could additionally be a problem with the wiring because that the sensor circuit.