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-   -   Check engine light (https://www.askmehelpdesk.com/showthread.php?t=229033)

  • Jun 20, 2008, 06:49 PM
    shellygalindo
    Check engine light
    My daughter has a 2001 Nissan Altima and her service engine light just came on today. I took it to Auto Zone and they diagnosed this with the troubleshooting code of P0420
    OEM Brand: OBDII Catalyst efficiency low-bank 1.

    What causes this and how is this fixed. I would like some kind of idea before I take it to a dealership or somewhere else... you know being a woman they will try to screw me over and tell me there is more wrong with it than there really is...

    Thanks
  • Jun 21, 2008, 02:33 PM
    WVHiflyer
    I found this site that may help: Check Engine, Service Engine Soon light, OBD II engine trouble codes

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