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check engine code 43? any help

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    #1

    check engine code 43? any help

    my car has been feelin a little shacky lately and my check engine light popped up with code 43 i heard it might be the oxygen sensor gone bad sending false data any help would be gladly appreciated...
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    #2
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    code 43 is for fuel system,do a fuel pressure test to find out..it should come up 32 to 36 psi..if you did the test and its in spec,then your o2 sensor is going bad (code 41).somehow code 41 (o2 sensor) can throw out code 43.my prelude si sometimes throw code 43 n 41 at the same time.but once i pulled out the codes again,i only get code 41 for my bad o2 sensor.

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      #3
      Code 43 is almost ALWAYS an oxygen sensor code in our cars. I have yet to see it be anything else. It says "fuel supply system", but a problem in the actual system (such as a clogged filter, failing pump, bad main relay) will NEVER trigger that code. 43 is an o2 sensor code. Essentially, the o2 sensor feedback is what the ECU uses to determine how much fuel to send to the engine... ie. fuel supply system.

      Replace your o2 sensor with a Denso or NTK/NGK unit (NO Bosch!), and reset the ECU. It should fix the problem. If not, you can look deeper. The o2 sensor is a wear item that should be replaced anyway, so it won't be a waste of money. However, I am 99% sure that replacing it will make that code go away.






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        #4
        engine code

        thanx that was it a faulty o2 sensor i was going to drop the gas tank i thought i had a (fuga) somewhere around the tank thanks guys

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          #5
          good thing you solved your problem. Also did you notice any MPG decrease?
          MY MRT
          http://www.cb7tuner.com/vbb/showthread.php?t=178936

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