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Check Engine Light
The check engine light comes on in a car when the engine is experiencing a problem. Ask questions here about your car's check engine light.
7,238 Questions
Why the engine light is on Toyota 4 runner 2003?
There are many possibilities why that light came on, too many to list here. Have your local auto parts store plug a code reader into your car to help narrow down the possibilities. They will perform this service at no cost.
How do I check codes on kenworth?
To check codes on a Kenworth truck, you'll typically need to use an On-Board Diagnostics (OBD) scanner or a proprietary diagnostic tool like the Kenworth Datalink. Connect the scanner to the vehicle’s diagnostic port, usually located under the dashboard. Follow the scanner's prompts to retrieve any fault codes, which will help you identify issues with the truck's systems. Additionally, consult the owner's manual or service documentation for specific guidance related to your Kenworth model.
What does the service engine soon light mean on a Ford F-150?
A: Code P0133 reads "Bank 1 Sensor 1 circuit slow response"; meaning the front oxygen sensor (located before catalytic converter) has slow response time to the changes in the air-fuel mixture. This could happen for many reasons, for example: bad oxygen sensor itself, bad or contaminated airflow sensor, intake manifold leak, exhaust leak, problem with the wiring, etc.
Visit your local dealer or a mechanic for proper testing procedure to pinpoint the exact cause. ---- A: The code P0102 reads "Mass air flow circuit low input". There is a certain procedure to test Mas Air Flow sensor (MAF) for proper operation. When you bring your car to a dealer, they will perform this procedure to check if the sensor is faulty. Mass Air Flow sensor failure is very common. ---- A: The code P1400 reads "DPFE Sensor Voltage Low" (Ford, Mazda). Often it's caused by bad DPFE sensor or clogged EGR passages. Visit your local Ford dealer, they will be able to help you. ---- A: P1000 is not actually a trouble code. It just means that the Readiness code has not been set yet or in other words, the engine computer hasn't completed testing certain emission control components. If there is no other problems with the car emission system, the code P1000 will disappear after driving for some time (the drive circle must include idling, stop and go traffic, acceleration and steady cruising). ---- A: Code P0171 reads "System too lean (Bank 1)" and code P0174 reads "System too lean (Bank 2)" What it means is that the engine is running lean. There are many possible problems that may cause the air-fuel mixture to be lean: Defective or contaminated airflow sensor, intake vacuum leak, dirty fuel filter, etc. There are certain tests to be performed to find the exact cause of the problem. Common problems with Ford engines are defective airflow sensors and vacuum leaks. As of my knowledge, Ford issued Technical Service Bulletin on this problem, you can check it at Alldata DIY.
I'd suggest to visit your local Ford dealer, they will be able to repair the problem properly. ---- A: Yes, overfilling the gas tank can trigger the "check engine" light to come on. Modern cars are equipped with an Evaporative System that prevents gasoline vapors from escaping into the atmosphere. When we overfill the gas tank, the excess gasoline can enter the part of the Evaporative system called Charcoal Canister and this can cause some problems. Don't fill the tank past the first click of the pump. Check your owner's manual.
Yes, a mass air flow sensor is probably the number 1 cause of the check engine light in your car, as long as the engine is not running rough. But a couple other poss. are coil/spark plug wires (if the engine feels like it is running rough) front or rear oxygen sensors Evap leaks (gas cap not on tight) But besides that, that is about it for check engine light issues on your car, if you get me the code I can tell you exactally what to replace.
My 99 made a loud howling noise that seemed to come from the air cleaner. It was actually the Idle Air Control Valve(IAC)motor mounted on the right side of the throttle body. It is a silver cylinder mounted by two bolts and has an electrical connector on the end of the cylinder. It get gunked up with soot it is about $80 new. You can clean it with solvent, but it is only a temporary fix. Best replace it before it goes south. I would suspect the power steering pump. Check the P/S pump fluid level. If it is full, then listen carefully to the pump. If it is whining, it is bad.
What could be the cause of a Random cylinder misfire?
Many possibilities. Plugs, plug wires, coil, ignition module, fuel injector, head gasket. Essentially anything that interfers with combustion on 2 or more cylinders.
Ford Ranger Speedometer not working and ABS warning light and Check Engine light on?
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired
How do you reset the engine code light on a 2002 dodge ram?
Try disconnecting the battery for 1 minute.
Why is my 2000 Chevy venture check engine light blinking?
When the engine is not firing on all cyclinders or has bad spark or lean or rich fuel it will cause the light to flash. Mine did this and I had a loss of power. I replaced the spark plugs and wires. It stopped the light and I got my power back as well as got more mpg.
How do you reset a service engine light on a 1997 Nissan Maxima?
First you have to locate ECM which is on the driver side just below the steering wheel and just right of gas pedal. You will be able to see ECM after removing a plastic cover. After that you will see a nut in that ECM, which needs to be turned clockwise and then anticlockwise. This is to be repeated three to four times with a span of 15-20 seconds. Next time you will start your car the annoying "Check Engine Light" should go away.
How do you turn off the service light on a clio 03 plate without going to Renault?
Try disconnecting the battery for about 10 minutes - sometimes it works
What does a chevy 454 V8 engine look like?
The valve covers are wider then the small
blocks and when looking at the headers the all four exhaust ports are spaced apart while the small blocks the middle two are side by side.
How do you turn off the Check Engine light on a 1988 Olds Delta 88?
It's on for a reason. It means that there is a malfunction in one of the engine control devices. Take the car to a shop and have them extract the codes, or if you want, go and get a repair manual for your car, and do the diagnostics yourself.
Why is my engine light flashing on my vp commodore?
Your engine light is flashing on the VP commodore because of the error codes.
The check engine light usually means that the computer has stored a problem code. Use a code reader to find out what's wrong with the engine. This means there is a problem that has been detected and needs to be fixed. If you are in the states, you can take it to Autozone for free testing. They can pull the codes that are causing that check engine light to illuminate and tell you what they mean (for free). This should help you with future troubleshooting.
could be a number of things, need to slef computer check, by turning the key to the on position then off, then on again, then off again, and on but leave it on the thrid time, watch your dit read out where your milage counter is, the codes will flash and when "done" flashes, the computer is done of self check mode. computer will hold codes im memory for a long time, check on web sites for what coades are what, and when fixed, diconnect the battery for about 2 mins to reset the memory of the computer. good luck
To figure out the codes (flashes) when you do that, it will begin by flashing once, wait a second, then flash twice (code 12) that's the beginning of the test. There will be a few second delay between the code numbers. The last one will be code 55 (meaning end of test). Several places have the meaning of the codes but an occassional check engine light is most likely the oxygen sensor. Its rather common. Usually code 21.
You don't start replacing things when an SES light comes on. GM OBD code readers are inexpensive and will save you time and money. It is also possible to jumper two of the connector pins together to read the code. Only then will you know what is truly malfunctioning.
i have a 96 neon and yes it is on that model, you have to go on/off on/off on in under 5 seconds, don't try to start it though, it will flash the check engine light- three flashes, a short pause, and five flashes means code35, then a longer pause and then the next number, when it gives you code55 that means its done. it will not show you all known codes for the car though, you can get it done at autozone though free. to get the meanings of the codes i suggest a haynes auto manual for your car (at autozone bout 15 dollars) easy to understand lots of pictures its how i knew to do the test on mine good luck crazymat That does work on a lot of Chrysler/Jeep/Dodge products.
blah blah blah if you ask this question you are a nerd
What does error code P0731 Gear Ratio Error in 1st mean?
The readings from the speed sensors in the transmission indicated that the ratio provided in first gear was not correct. This can happen do to an improper sensor reading (failed sensor), the transmission slipping (low fluid/internal failure), or from the transmission being in a different gear then what was selected (either a linkage or internal hydraulic problem).
What does it mean when our goodman furnace has a blinking light?
circuit board on goodman furnace blicking continously after try to start
3 times fire down led light
Why would my back lights reverse lights an interior lights not be working but my head lights are?
The headlights are on a separate circuit. Check the fuses and if that's not the problem check the headlight switch. You may need to get into the vehicle and trace back the wire that provides power to the faulty circuit.
Remember to not replace parts until you've found a real problem and you've been able to verify the problem through testing the part.
