2.7T Allroad check engine light problems

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08-30-2007, 08:32 AM

duglas

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2.7T Allroad check engine light problems

I have a 2001 Allroad with 2.7T and auto..
I am getting the following codes

P0171
P0172
P0174
P0175

I changed Bank 1 Pass. Ox sensor and I still get the codes after 20 miles of driving no matter if on the highway or around town

any ideas?? I check for vacuum leaks and replaced a line that looked weak

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08-30-2007, 10:07 AM

quickaudi:STFA

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Link inside should help

P0171 - you're running lean
P0172 - you're running lean
P0174 - you're running rich
P0175 - you're running rich

did you plug the O2 sensor back in? maybe all of them are bad? have you pressure tested? you don't have a bad EGT, yet... Maybe a bad MAF is causing the codes to get thrown.

Please, find someone with a VAGCOM to do a real scan and post it up.<ul><li><a href="http://www.s4biturbo.com/dtc_search.cgi">P-code search</a></li></ul>

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08-31-2007, 06:40 PM

paulroad

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come to the allroqad forum

lots a posters and help too.

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09-11-2007, 02:38 PM

Vier GlÃ¼hende Ringe

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System too lean and too rich banks 1 and 2

You may have an intake leak, that will cause to lean at idle and two rich during boost. If you don't have a leak and you have a bosch MAF sensor then replaced the MAF. I highly doubt it is you O2 sensors.