2003 Cadillac CTS 3.2 V6 Flashing check engine light P0171 P0174 Lean Bank 1 Bank 2 Checking for air leaks vacuum smoke test boot connection clamp

2003 Cadillac CTS 3.2 V6 Flashing check engine light P0171 P0174 Lean Bank 1 Bank 2 Checking for air leaks vacuum smoke test boot connection clamp

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