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Diagnostic code P0171 read following morning. After several minutes of driving next morning service engine light goes out. Out side temp around 70 degrees.
Vehicle: Pontiac 2000 Bonneville SSI 3800 Series II supercharged

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Hi there

Typically this code is not a result of any external temp issues. The code is for a lean fuel mixture on bank 1. The common issues are a vacuum leak, bad front O2 sensor or low fuel pressure. Here is some more info for you.

P0171 OLDSMOBILE - Fuel Trim System Lean Bank 1

Read more: https://www.autocodes.com/p0171_oldsmobile.html

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