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Obd II codes

This topic contains 9 replies, has 5 voices, and was last updated by Avatar Rick 6 years, 3 months ago.

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  • #584099
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    Chase
    Participant

    Hello, I have a 1996 nissan altima gxe automatic with 174,500 miles. The check engine light has been on sense before the last owner bought the car and I got it checked. Here are the codes: P0340 camshaft position sensor
    P0325 knock sensor
    P0335 crankshaft position sensor circuit
    P0720 output shaft speed sensor circuit
    P0734 gear 4 ratio incorrect
    P0130 oxygen sensor circuit
    Cleared codes and camshaft didn’t come back
    Now there is pretty bad hesitation when accelerating. I was told the motor mounts are bad and there’s a leak in the exhaust flex pipe. I don’t know what to do or where to start or anything really.. Any help is greatly appreciated! Thanks!

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  • #584111
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    Bennett Fleisher
    Participant

    Did all of the other codes come back? The 700 level errors are transmission related. I have seen transmission errors and changing of trans fluid has corrected it. Then again, I have seen where it does not.

    As far as the other errors, just like the 700 errors, it would be good to know what comes back, especially since you have a hesitation now. The best thing you can do, in my opinion, is try to knock them out one by one and it may correct multiple errors in the process.

    #584120
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    Chase
    Participant

    All of them but the camshaft sensor came back. I was wondering if there may be an electrical problem as it says circuit for all of the sensors.

    #584185
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    EricTheCarGuy
    Keymaster

    You have some serious codes there. Mainly the transmission codes I’m concerned about. Transmission problems can cause performance issues, including hesitations. Given that might be your most expensive fix, I would pursue that first. You may even want to take it to a transmission shop to be diagnosed as the codes you have indicate that you might need a transmission. More info in these articles.

    http://www.ericthecarguy.com/faq/solving-transmission-problems

    http://www.ericthecarguy.com/faq/solving-automotive-performance-issues

    Good luck and keep us posted.

    #584283
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    Chase
    Participant

    that’s a bit scary considering I have no job..

    #584298
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    David
    Participant

    You have a few codes that indicate a few circuits have gone bad. I’d think it’d be worthwhile checking your fuses to see if any have blown. In my experience, a blown fuse is more likely than a failed circuit, especially considering that one fuse can cover many systems.

    #584597
    Avatar
    Chase
    Participant

    I checked all fuses with a multimeter ad they are all good. I noticed that the 2 ABS fuses are gone, and that some of the prongs are missing where one would go. I’m guessing that is a problem that I wasn’t informed of..

    #584601
    Avatar
    Rick
    Participant

    …or it means you don’t have ABS.

    With so many sensor codes, I would start by looking for an electrical problem. You need to start with a factory service manual or something like alldata DIY (which is relatively cheap), so you know what to look for on those circuits. You’ll have to decide for yourself if you have the ability to do this.

    I don’t know how Nissan’s work, but Chrysler has a couple sensor circuits on which the computer supplies a 5 volt reference voltage or an 8 volt reference voltage. As an example, a short to ground on the reference circuit could bring down all the sensors at once.

    #584640
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    Chase
    Participant

    okay, now i posted another topic a little while back, when i accelerate to about 2000+ rpms the temp gauge drops and dances around until I let off, then jumps right back up. Maybe that’s related?

    #584650
    Avatar
    Rick
    Participant

    Maybe. Here’s where factory wiring diagrams can help you see connections. Also, dancing gauges can mean you have power that’s not clean– that can cause all kinds of crazy issues. Make sure your battery is good, make sure your battery and ground connections are also good and corrosion free. Find the engine ground strap too, make sure its good. A bad alternator diode is another possible source of messy power (AC ripple).

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