Question about 2003 Nissan Altima

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Misfiring how do you know if it's the spark plugs or the O2 sensor?

Posted by als1975 on

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Anonymous

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O2 sensors should not cause a misfire. A scan tool can read the O2 sensors readiness when the car is running. Most often the MIL(engine light) will come on if it isn't working properly. Inspect the plugs, and check gaps. Just replace them all if it has been a while.
It may be the plug wires, which can be checked with an OHM meter, simply. You need the numbers from the repair manual to see if they are in range. If you have coils, they can be chaeck the same way. If you have a distributer, then check or replace the cap, even a small crack can cause problems.
A cheap spark checker can be used at the end of each plug wire to check for a strong spark.
That about cover it.

Posted on Jan 15, 2010

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dockterok

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Try fuel injectors.

Posted on Jan 15, 2010

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5 Related Answers

Anonymous

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SOURCE: cylinder 3 misfire

Make sure you're using the recommended spark plugs. When my car did that, I had put Bosch Platinum Plus-4 plugs in and got that same problem. Turns out the plugs are too hot and cause it to fire prematurely and kick the misfire code.

Posted on Jul 24, 2008

Anonymous

  • 32 Answers

SOURCE: Cylinder 1 misfire on my subaru!!

What you should check first is the spark plug for the #1 cylinder and see if there is a white film on it this would be a sign of a coolant leak which would cause a problem with the O2 sensor

Posted on Oct 11, 2008

Toyota Ed

  • 1861 Answers

SOURCE: 99 4runner 5vz-fe 3.4 misfire

Replace the coil packs.
Your issue is NOT the converter, or you would have a P0420/P0430 code

Posted on Dec 26, 2008

Anonymous

  • 7 Answers

SOURCE: Possible o2 sensor 2002 GMC Onvoy

crank shaft sencor,cam shaft sencor.good chance of these being the problem....

Posted on Jan 15, 2009

Anonymous

  • 1 Answer

SOURCE: location of O2 sensor in bank 2, 99 5.4 expedition, running lean

I have a ford 2003 windstar that was running very rough when cold and almost stalling. engine light came on. went to autozone and they read the codes for free and told me it was running lean on Bank 2 also. i came home searched for the O2 front sensors online using the info autozone gave me. there are 2 front sensors on my car that need to be replaced at the same time. look for ones that have a direct plug in and don't need wire splicing. the ones without the wiring harness are cheaper but more of a pain, i think.
they were fairly easy to replace. getting access with the wrench was the worst. reset the light by disconnecting the battery for a few minutes. seems fine now and the light hasn't come back on.

Posted on Jan 25, 2009

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Lean fuel mixture code. Both banks. Where is the o2 sensor located? I changed air and fuel filters. Low idle control was bad, replaced it. Changing spark plugs, not done yet.


Air Filter, Fuel Filter,Plugs,Idles Solenoid or Valve, not the issue.
Use logic and know what the parts your about to change do!
O2 Sensors are in the converters or exhaust pipes near it.
The Codes don't mean there bad or to replace something. That is not what codes are for.
While you may have a worn O2 Sensor,you may also have a vacuum leak, that is driving the sensor out of range and setting the codes.

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I got this trouble code p1610 and it reads manfacurer control


p 1610 means you have a bad o2 sensor. since the sensor wasn't functioning properly it was telling your engine to run rich which caused alot of carbon build up on your spark plugs they spark but don't put out enough spark to ignite. replace your plugs with NGK platinum plugs. gap them to the correct size. and try again then get a new o2 sensor and that should fix the problem. write back and tell me how it works out!

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I have a 97 plymouth voyager van that dies out while going down the road we have replaced that converter, plugs wires cap rotar and it is now saying multi mis fires is it a bad o2 sensor


well you might have"bad ign wires" or bad ign coil!!!!O2 sensor wouldn't do that usually miss fires is wire ,coil, broken or crack porcelain on spark plug usually done on installing them!!!!!! I know the three spark plugs closest to fire wall are not easy to get at and some time spark plugs get cracked and over looked good luck

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