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I'm throwing the P1136 "system too lean code"

   
Old 11-22-2006, 05:39 AM
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Default I'm throwing the P1136 "system too lean code"
My check engine light came on about a month ago then after 4 days it went off. I had someone vag my car anyways and it showed two fault codes, P1136 and P1559. Now my check engine light is back on and I'm assuming it's the P1136 code. What could be causing this on an AEB engine? From what I searched it seems a vacuum leak can cause this or an oxygen sensor. What oxygen sensor is this? Thanks!
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Old 11-22-2006, 05:43 AM
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Default 1. Check all vac lines for leaks
2. If all lines are good, order a rebuilt MAF from PureMS for $99.

3. Replace front O2 sensors.
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Old 11-22-2006, 05:49 AM
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Where are all the front O2 sensors? I know the one on the Cat.
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Old 11-22-2006, 05:52 AM
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Ooo you have a 97- I'm not sure about your O2 configuration
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Old 11-22-2006, 05:58 AM
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My lean code was solved by replacing my MAF.
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Old 11-22-2006, 06:22 AM
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Default Pre-cat sensor is easy as pie to replace and cheap too for a '97
<ul><li><a href="http://www.autohausaz.com/search/product.aspx?sid=2h2f4j2ofjssh25505npu455&amp;make id=800002@Audi&amp;modelid=1008740@A4%20QUATTRO%20 &amp;year=1997&amp;cid=@oxygen&amp;gid=5132@Oxygen %20Sensor">Get it here!</a></li></ul>
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Old 11-22-2006, 06:23 AM
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Umm, doesn't change on any of the L4 engines... There's one pre-cat and one post cat.
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Old 11-22-2006, 06:34 AM
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Default The front sensor is here, right?
<center><img src="http://pictureposter.audiworld.com/19986/cat.jpg"></center><p>And where exactly is the MAF located? I've read it's a really easy job.
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Old 11-22-2006, 06:39 AM
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That is the pre-cat sensor and the MAF is located in the air intake.
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Old 11-22-2006, 10:47 AM
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Default Just ordered the pre-cat sensor and a rebuilt MAF and my check engine light goes off
I'm sure it will come back on so its not a bad idea to replace those two things.
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