FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Astro Van 2WD V6-4.3L VIN W
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Scan Tool Data, Normal Values and Definitions
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Scan Tool Data Definitions - Powertrain Systems
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Rich/Lean BN 1
Rich/Lean BN 1
RICH/LEAN
The Rich/Lean BN 1 parameter indicates the oxygen content in the exhaust gases in bank 1. Rich indicates low oxygen content, lean indicates high oxygen content.