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Check engine for left bank runing to lean - 2005 Audi A4

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Hi Chris
You have obviously had a diagnostics check done to know that the left bank is running lean,This could be an air leak,But most likely is one of your lambda sensors failing,This is fitted in the exhaust near the. manifold

Posted on Nov 27, 2013

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Posted on Jan 02, 2017

j_del
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SOURCE: check engine code -- lean bank code

If that's the only code, it's likely the primary O2 sensor (before the catalytic converter). That's the one that determines the fuel mixture.

Posted on Nov 04, 2009

ZJLimited
  • 17970 Answers

SOURCE: system is running to lean on bank one

As it says just one bank I would suspect possibly an injector or lambda. In Vagcom you can do a lambda load test, I suggest you do this as it individually does each lambda sensor to check it.

Check your injectors as well.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Posted on Nov 10, 2011

andikovaci
  • 40 Answers

SOURCE: what does bank 1 too lean mean on audi 2003 a4

please some specification what motor u have with diesel or what?
When the engine light flash you are driving or before you start the car. And if u can more aether specification. Thank you

Posted on Mar 23, 2012

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