Question about Hyundai Motor 2002 Elantra

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Error code po340 for a 2002 hyundai elantra

At first when my car was running bad, my father bought a book for it, and used an equipment that gives the codes to tell if something was wrong. The first time using it, it came up with the codes saying my cam shaft sensor and my crank shaft sensor were bad. So I replaced them. The car was still acting funny, so we decided to use the warranty i had on the sparkplug wires, replaced those, has brand new o2 sensors too. the check engine light came on, my father tested it, and its been saying this po340 camshaft sensor A bank Circuit 1 malfunction. Weve tested all that we could, and everything is good. The only thing the thing keeps saying is that code and cam shaft A bank circuit 1 malfunction. If someone could please tell me what this means, where it is, and possibly an idea on how to fix it, id really apperciate it. Thank you

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Here is what I could find on your P0340 error code:
CausesA code P0340 could mean one or more of the following has happened:

  • a wire or connector in the circuit could be grounded/shorted/broken
  • the camshaft position sensor may have failed
  • the PCM may have failed
  • there exists an open circuit
  • the crankshaft position sensor may have failed
Possible SolutionsWith a P0340 OBD-II trouble code, diagnosis can be tricky at times. Here are some things to try:
  • Visually inspect all the wiring and connectors in the circuit
  • Check for continuity in the circuit wiring
  • Check the operation (voltage) of the camshaft position sensor
  • Replace the camshaft position sensor as required
  • Check the crankshaft position circuit as well
  • Replace circuit wiring and/or connectors as required
  • Diagnose/replace the PCM as required
Sounds like since you have replaced both the camshaft and crank shaft sensors you need to look at the PCM.  Go down the line of possible solutions and don't replace the PCM unless nothing else works obviously.  I hope this helps but it looks like you are looking at getting a new PCM.  Good luck.  Thanks for rating my response and for using FixYa!

Posted on May 27, 2009


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