Question about 2002 Hyundai Accent

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Hyundai verna 1.5 g4fk engine have LB light on (instrument panel)

I start de engine without problems, but just warm up and then begin the fall that indicates with the LB light on instruments panel... We dont now wath is the problem...my car dont acelerate enougth...

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I have the same problem with my car and i checked the computer with a OBD2 device but it did not show any problems. if any one have a good solution help us

Posted on Feb 02, 2010

  • amernashawat Oct 20, 2010

    i had the same problem for while then my check engine light turned on , i checked the car a service center and the oxygen sensor the 5 line one was dead , after i changed the sensor ((Bosch)) 5 lines the lean burn system worked perfectly without any hesitations the became smooth again

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Mi carro es igual y ya lo repare es lo mas sencillo así que nunca lo iba a imaginar y me salio gratis, fui al concesionario donde compre el carro de segunda mano por supuesto y le pedí ayuda y esto fue la solución: tienes que quitar el velocímetro y buscar en la parte de atrás del velocímetro un tornillo que de el dice REED cuando lo tengas localizado lo quitas y vuelves a poner todo en su lugar y el problema de la luz L/B se habrá ido, este procedimiento anula el sistema lean burn (L/B) que cuando esta funcionando de manera normal se encarga de controlar la mezcla de combustible aumentando la proporcion de aire hasta un 20% en aceleraciones demasiado profundas y que esta relacionado con emisión de gases y ahorro de combustible también me explico que el origen de la falla es tener en mal estado el catalizador que tiene una vida util de 5 años asi que si lo quieres original lo cambias pero yo no puedo comprarlo porque acá vale $ 400 dolares, así que tome la opción económica y no he tenido problemas, espero haber podido ser de ayuda y espero tus comentarios, trate de traducirlo al ingles pero no se entendia bien asi que disculpen
Saludos,

Posted on Apr 28, 2010

  • Manolein Mar 15, 2011

    gracias por la ayuda me imaginaba que era del sistema de ahorro de combusttible. osea que cuando necesita mas aceleracion el vehiculo inyecta aire y pones mas peso en el pedal.
    asi me quedo mas tranquilo,ya que no es una falla.

    manuel leiva iquique chile

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If this is the same as the hyundai verna 1999, which I have, I have been told by the mechanic i bought it off that it is the 'Lean burn' system in the car that reduces the flow of petrol to the engine when you are running at below 2000 revs to save fuel, which kind of makes sense with the lack of acceleration when the L/B green light is on. It gets a little bit annoying at times, but just put your foot down a bit harder then the light goes off and no problem with acceleration after that!!

Posted on Mar 03, 2010

  • rooms_availa Mar 03, 2010

    Hope that helps

  • tag_rojban
    tag_rojban Feb 21, 2013

    rooms_availa , i hav the same proplem surly with hyundai verna 1999 i dont know the solution yet !!

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You need to have a diagnostic test done,you can do this with an OBD2 reader,this will tell you the problem.

Posted on Apr 13, 2009

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Its a nice system to reduce petrol consumption, when the LB light light in your car, just remove your leg from the benzen then push it again.

Posted on Nov 25, 2014

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    r11570a.gif


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    r11573b.gif


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    r11571a.gif


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