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2013 Gallardo - Final Edition
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This is what google says: "Trouble code P1131 means that the powertrain control module has detected a lean condition for engine bank No.1. Code P1131 can be caused by a vacuum leak, fuel injector problem, ignition problem or by a faulty oxygen sensor. You can find the oxygen sensor that reports this condition in the exhaust pipe for engine bank No.1, before the catalytic converter. "

Hope that helps!
 
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