Question about Hyundai Motor 2002 Elantra

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2002 Hyundai Elantra that says my on board computer is not ready to be tested. Emission results are: readiness- fail, monitor comprehensive- not ready, monitor EVAP not ready,monitor O2 not ready.

What exactly do I need to do to get it ready for inspection?

Posted by Joe Gersh on

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old marine

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  • Hyundai Master
  • 2,383 Answers

Did you recently clear the trouble codes or disconnect the battery? Once all codes are cleared, the computer will not display systems 'ready' until they go through an evaluation cycle. Some of the systems require a certain number of drive cycles before they will display 'ready'. A drive cycle is usually starting the engine from a cold start (based on coolant temperature) and driving until certain conditions are met. I don't know what the requirements are for your car, but my 2003 pickup truck requires more than 10 drive cycles before it will make the O2 sensors and evaporative emissions 'ready'. Most states only require that a certain number of systems are showing 'ready' to pass emissions certification.

Posted on Oct 22, 2016

  • Joe Gersh
    Joe Gersh Oct 24, 2016

    Yes I had the codes cleared but no I didn't disconnect the battery

  • old marine
    old marine Oct 24, 2016

    Disconnecting the battery for about 5 minutes or so does about the same thing as clearing the codes as far as the ECM goes. It also erases your radio presets, disables the clock, etc., so clearing the codes is the better way. But as you noted, it takes a while for the ECM to declare all systems 'ready' after you do this.

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