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Volkswagen cc could trouble code 2187 be caused by faulty fuel cap

gas cap is always loose when fueling up

Vehicle: 2010 volkswagen cc 2.0 turbo
asked Feb 15, 2013 by anonymous

1 Answer

P2187 Bank system too lean at idle,  can a gas cap loose cause this code? No. You have a lean air to fuel ratio. Lean air  to fuel ratio can be causes by a MAF (mass air flow) that is faulty or even a bit dirty, A MAF air flow cleaning may help, Vacuum leak can cause lean idle, Fuel pressure low or even a  partial clogged injector, Above all it may be time for a tune up, worn sparkplugs do cause lean air to fuel ratio,And if you have a faulty gas cap replace it,Fumes are gasoline also.
answered Feb 18, 2013 by Reynaldo (3,979 points)
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