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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
po 325 is a knock sensor and code po443 is evap canister purge control valve
I just had one in the shop here. You may also notice that your coolant guage shows lower than it used to. This is likely a coolant temperature sensor, located on the back of the cylinder head. It is giving out of range readings of the engine temperature, and will be most noticed on startup. It is very important to remember to check the pigtail when changing the sensor because corrosion is what usually wrecks the sensor in the first place. It is too difficult to clean the pigtail so replacement is a strong recommendation. Any Saturn dealer should have it. Abe G.
What do you do if your house does not pass inspection?
The contractor should repair or replace the items that failed until it can pass inspection. Do not accept the house as done until such time as it passes, however inconvenient it is.
Why does the check engine light come on after driving about 40km when nothing is wrong with it?
The check engine light is telling you that it is time for maintenance even if nothing is wrong. Go into an auto parts place and have them reset it for you. Because Is Telling You The Something Is Wrong Take You Car To The Shop & Ask Them To Conect The Scaner & Check For Codes History & see What Codes You Car Have On The Memory You Go From Ther
What does OBD II codes 446 mean?
According to Repair Pal, Code P0446 indicates that there is an improper voltage drop in the EVAP Vent Valve circuit, which can be caused by either too little or too much electrical resistance.
Why is the check engine light coming on in a Toyota MR2 Spyder that only has 2000 miles on it?
Take it to Auto Zone and have the codes checked and cleared, for free.
How do you replace the check engine light on a 96 Ford Ranger located in dashboard?
The question you ask is too involved for a proper answer. You need to go to a car parts store, and get a repair manual for your car. They cost about $16.00 Or, go to a Public Library.
What is wrong with my 1998 Navigator when the check engine light is on and it is idling rough?
Have vehicle scanned to determine the problem Possibly a bad ignition coil
What would make the check engine light come on in a 1992 Mitsubishi Expo?
There are dozens of things that turn the light on. Get the codes read at the auto zone.
Skoda octavia 2006 not start key is ok lights in the panel comes and then off and engine not start?
Underneath steering wheel check relay 100&103
Why does the check engine light come on a 2002 ford explorer after you have replaced the erg?
Assuming you mean the egr valve, I would make sure that you have the check engine codes cleared. In addition, are you sure that it was truly the egr valve, and not the DPFE sensor monitoring the valve?
most likely and aftermarket alarm has been installed? if not, check all the fuses, and basic electrical connections...read up on checking procedures... everyone should have a manual for their vehicle, and a professional shop manual should be available at the library in the reference section--you can make copies of the necessary information...good luck :)
What are all the 1997 Dodge Intrepid check engine light codes if you don't have code reader.?
Have vehicle scanned to determine the problem - most auto parts stores will do this free
Can you fail an emission test if your check engine light is not working?
yes they but it on a scan tool and they should tell you what the problem is and what needs to be done.
What part would make your car not pass smog regulations because of hydrocarbons?
Perhaps this may help you in your search for causes. A high hydrocarbon reading is usually unburnt fuel. If the CO reading and the NOx readings are below the limit then look towards an ignition problem as being the most likely culprit. As the prior answer suggested, start checking items and begin with the basics. Year, make model, engine size, options, symptoms etc will help you get a more accurate answer next time.
Check the plugs first, all of them! One bad plug will give you a miss and everytime the car misfires unburnt gas goes into the cylinder and out the exhaust which raises the HC. Same goes for the wires (check resistance with a multimeter) check the distributor cap & rotor (if applicable) for cracks, corrosion or burnt areas. Might want to do an injector service (if applicable), a sticky injector might put fuel in at times when its not supposed to and up goes the HC. If the check engine light is on 1st thing to do is pull some codes and this will give you some direction. Codes can be pulled manually by using the diagnostic connector or a scanner.
Answer
High hydrocarbon levels are also seen with a much too lean mixture. If you are looking at an older carburated car, check this first. A lean mixture will not burn completely, and unburned mix goed out the tailpipe. An overly rich mixture burns fine, but to carbon monoxide, not dioxide. So a rich mixture will fail on CO, not HC. This is the reason for the vacuum hose fix - it cuts down the amount of air entering the engine, while leaving the fuel the same ( or increasing it a little if the leaks are really bad ). This said, the ignition system is also suspect, as any misfire will increase HC. So, check your vacuum hoses (lightly spray connections w/ carb cleaner, an RPM increase means a leak), change your plugs and wires if they're more than a year old, and richen the mixture a hair if this adjustment is available.
More Information:
I had to replace a lot of vacume lines to get mine to pass. It also could be o2 sensor, bad spark plugs, rich idle(too much gas), bad spark plug wires, bad injectors(or carburetor), bad ignition coil/cap/rotor(weak spark), bad catalytic converter/clogged muffler, exhaust leak, etc.
yes ,gud chance it is blocked
Can the O2 sensor make your engine light go on and off at random times?
Hey Mike==It can but why guess. Go to Auto zone and have them check it our for free and you will know what is causing the light to come on. You can clean 02's but be sure the carb cleaner you use has NO silicone as it will ruin it for sure. GoodluckJoe
When your check engine light come on and your car start to jerk which sensor is it?
Impossible to say. You need to have the ECU scanned with a scan tool. The tool will retrieve the code that has been set. That code will help to find the problem if you know what you are doing.
What does Check Engine Light Code P0140 on a 1997 Mazda Protege 1.8L stand for?
It means there is bad/no connection between the car's computer and the oxygen sensor after the catalytic converter.
How does the car know the EGR valve is bad?
If the egr valve was stuck open, the engine wouldn't idle. If the egr valve was stuck closed you may hear excessive pinging (spark knock) and in most vehicles, the check engine light would illuminate.
Why would the engine light stay on in a 2005 pantiac vibe?
Mine is on because the oxygen sensors are having an issue. Just took it in to be checked goes in next week to be fixed. Also received a recall couple of months ago I took it in for but I doun't remember what part was replaced.
How do you get the service engine light to go off on a 1999 Oldsmobile alero?
Have vehicle scanned to determine the problem and have codes cleared
