2000 Pontiac Montana did not pass emission test

2000 PONTIAC MONTANA
188,000 MILES • 6 CYL • FWD • AUTOMATIC
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ADMILLER899565
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vehicle did not pass emission due to oxygen sensors,can a diagnostic check tell me which ones are bad?
Feb 22, 2009 at 6:39 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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