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Old 03-04-2014, 09:23 PM   #1
technicien
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Default problème bmw 318i

Bonjour à tous,
Je réparer une bmw 318i de 2000 , moteur m43, au diag j'ai
Valeur sonde 02 hors limite.

De quoi s'agit il?
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Old 03-04-2014, 09:54 PM   #2
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C'est sûrement ta sonde lambda O2 ou oxygène qui te pose probleme , regarde de ce côté la

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Old 03-05-2014, 02:45 PM   #3
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A ton avis il faut la remplacer ou bien est ce possible qu'autre chose fausse le melange air carburant et ainsi la met en défaut?
Autre chose le ralenti fait un léger yoyo.. est ce lié?

J'ai nettoyé le boitier papillon mais pas de changement...
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Old 03-05-2014, 03:24 PM   #4
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Regarde sur autodata ou vivid tu pourras facilement la contrôler , en règle générale ,
je ne connais pas ton modèle mais cette sonde est équipé d'une partie électronique gestion calculo et l'autre c'est une résistance chauffante ! Si tu veux de la doc je peux regarder cela !

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Old 03-09-2014, 10:00 PM   #5
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à changer?
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Old 03-10-2014, 12:22 AM   #6
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Quote:
Originally Posted by technicien View Post
à changer?
Salut,


Les "yoyos" de ton ralenti sont du effectivement a ta sonde Lambda

- Vérifie le cablage de la sonde si pas de fil coupé (ca arrive)

- Change là si les fils sont Ok

++
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Old 03-10-2014, 09:49 PM   #7
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merci je vais vérifier tout cela.
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Old 03-11-2014, 08:25 AM   #8
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Quote:
Originally Posted by technicien View Post
merci je vais vérifier tout cela.
yes u probably have awire short circuitto 12volts,thats why it goes out of limit,u can read up to 3000mv,this will cause idling upand down,when ecu try tomake corrections.ope this helps,i had similar situations.

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yes u probably have awire short circuitto 12volts,thats why it goes out of limit,u can read up to 3000mv,this will cause idling upand down,when ecu try tomake corrections.ope this helps,i had similar situations.
plz chk from conector fromecu to lampda, ,unplug it read from ecu connector voltage received,if its out of tolerance ,cut wire from ecu pin ,make new wire to plug,thats wat was happening to my cars,had abt 5 cars with this situation.

Last edited by cedrsan; 03-11-2014 at 10:19 AM.
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Old 03-20-2014, 07:11 PM   #9
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je reviens vers vous avec le meme probleme en fait il y a deux sondes lambdas et je ne sais pas laquelle changer la sonde en amont du cata ou celle qui est en aval?

Puis en réalité est ce vraiment elle qui est incriminée?
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Old 03-22-2014, 08:05 AM   #10
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ton code défaut te permet de savoir quelle sonde est HS.

à priori, vu qu'il y a un impact sur le ralenti, je dirais que c'est la premiere, celle avant cata.

La deuxiéme sonde aprés cata ne sert qu'à tester l'efficacité du cata, et n'agit pas sur l'enrichissement du mélange.
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