Question about 2003 Nissan Altima

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2003 Nissan Altima 2.5S, Check Engine Light Problem.

I have check engine soon Light on my 2003 Nissan Altima 2.5S. It starts making big shake and sound when I stop and my car in gear and also GAS smell start coming. When, I shift D to neutral, it become well.
Code reader shows “Crankshaft position Sensor problem”, but I replaced new sensor from dealer, reset check engine light. After few miles engine light comes on again and still same problem. Please advice. Thanks.

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  • riakata Mar 10, 2009

    I have exactly the same problem, first it was the camshaft sensor ichanged that, then it was crankshaft sensor i changed that too, now i am getting crank shaft sensor again and also a speed sensor.

  • arun_kaushal Mar 18, 2009

    I just replaced all spark plugs and 1 bad Ignition Coil, Problem Fixed, easy to check and replaced. May be one of 4 is bad causing problem. I found on eBay for $60, NISSAN dealership have same part for $125. It works for me.

  • Anonymous Mar 12, 2014

    2003 nissan murano --engine light on--after driving vehicle approx 3-5 minutes greater than 35 miles per hr--all of a sudden car downshifts to lower gear--quite scarry and unsafe--told by nissan dealer --needs new transmission--have taken it to transmission dealer and they are thinking it might be speed sensors--whats your thoughts

  • Anonymous Mar 21, 2014

    trying to reset my check engine light soon car is running fine just cant afford to take in so wanted to see for a do it yourself

  • Anonymous Mar 21, 2014

    My engine light is on codes say to change maf / ait sensor did this checked for pressure and it is good car runs and has no start up problems need answer insp is almost due

  • Anonymous Mar 25, 2014

    Engine light reset after repair sensor

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This problem could be caused by the mass air flow censor, i had the same problem with my car. it is really pricey at the dealer so you might want to check elsewhere for this part. I found one at a scrap yard for 85% less that the dealer and i also got life time warranty, the dealer does not offer any warranty on this part.

Posted on Oct 22, 2008

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My service engine soon light came on saturday on my 2003 nissan altima 2.5s, took it to the dealer and he stated I need a Catalytic Converter for the light to go off. Last yr Jan I had the same thing happen and there was a recall on the ECM they reset it for free. Any suggestions? I am so tired of getting ripped off being a single woman. The repair price they gave me was $940, my mechanic says he can repair w/new converter total charge of $300

Posted on Mar 17, 2009

  • joseph nunez Nov 24, 2012

    I think $300.00 to replace the catalyc coverter is a desent price, you are not getting riped oof.

  • joseph nunez Nov 24, 2012

    it sounds to me your mechanic is a honest mechanic, I had the same problem and I paid $300.00 to have my replaced

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I have a 2003 nissan and the check engine light came on and it idles for a couple seconds after tapping it?

Posted on Apr 17, 2012

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1 Answer

Why does the "service engine soon" light appear on


you have an issue with vehicle. could be anything from loose fuel cap to failed catalyst/ cat convertor, which is very expensive. you need to know the code number to get started with diagnosing issue. get your self a small hand hels scanner from your local friendly auto parts store and scan for codes. some part stores may even scan it for you for FREE. nissan dealer will charge you arm and your leg to look at it. our dealership charges 1hr of labor to look at "service engine soon" light and diagnose it no matter if it takes 5 minutes to figure out or 45 minutes you will pay 1hr of labor which could be around $100 big ones. so get a scanner which goes for around $60 and scan it your self and this way you have a scanner for future if the light comes on again for something else. that light can copme on for number of reasons.

Oct 10, 2011 | 2003 Nissan Altima

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check engine light just means the is some type of problem with a sensor or something with your engine that should be checked out soon.

Jan 18, 2011 | 2003 Nissan Altima

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If the check engine light is NOT on, it will be a mechanical problem like a clogged air filter, fuel filter or faulty spark plugs. If your check engine light IS on, it is a sensor like the O2 or MAF for example. Best to get it diagnosed if the check engine is on to specify with sensor is causing the problem.

Jan 10, 2011 | 2003 Nissan Altima

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misfires poor acceleration engine shaking check engine light on and no start either way if you get a crank sensor code you better change it before it goes altogether hope this helps

Aug 08, 2010 | 2003 Nissan Altima

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I start my car this morning and engine service soon idication falshed more then one time and continue flashing my question is is it safe for me to dirve the car till monday as i feel the shakes while i am...


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2003 Altima shuts off while stopped at red light


If you have a Service Engine Soon light on, then having the computer scanned for codes would be recommended. The code could indicate what the problem may be. The most common is cam and crank sensors.

I would have it checked to verify.

Thanks Jay!

Jul 23, 2009 | 2003 Nissan Altima

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When is running start to shake like if going to start off and the check engine light start to blink but all stop and the car continue run without problem


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Jun 30, 2009 | 2003 Nissan Altima

1 Answer

MAINTENANCE REPAIR ON HIGH MILEAGE NISSAN ALTIMA


Your vehicle’s computer system has self-testing capability. When the computer senses that there is a problem with one of the components or sensors it stores the correspondent trouble code(s) in its memory and lights up the "Check Engine" or "Service Engine Soon" light to tell you that there is a problem and you need to diagnosed and repaired it. Some problems are minor, but if not addressed it could become major. The list of possible codes number in the hundreds. The code itself doesn't tell exactly what component is defective - it only indicates where to look, or what engine parameter is out of normal range. You or a technician will have to perform further testing to pinpoint cause and the proper repair. Even if you reset the light, if the underlying problem is not addressed it will come back on.

Please let me know if this information is helpful. Positive feedback is appreciated. Thank You!

Apr 01, 2009 | 2003 Nissan Altima

1 Answer

2003 nissan altima


Most likely cam and or crank sensors. Have it scanned to be sure.

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