2001 passat - emission workshop

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Old 06-24-2010, 06:25 PM
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Join Date: May 2009
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Default 2001 passat - emission workshop

Hello,

so i am getting the dreaded emission workshop.

The codes i am getting are p0301-p0304 and p0171

which are misfire on 4 cylinders and system to lean (bank 1).

Here is what i have done

got the 4 ignition coils replace, replaced the mass air flow, replaced the air filter, replace the plugs.

I just check the L wire and it doesn't have any cracks or holes

I don't know what to do next.

any ideas would be great.

Thanks
Scott
 
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