Please help

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aaronkitchen

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Apr 3, 2016
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Got a couple of engine codes. Can anybody lead me in the right direction on fixing them? No money for mechanic. Ive got a 2001 tahoe LS with a 5.3 and 212,000 miles. These are my codes

P0327 powertrain knock sensor 1 cuircut low input (bank one or single senso)

P0440 powertrain evaporative emissions
control system
 
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