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Home >> Buick >> 2001 >> LeSabre Custom, 4T65E/M15 >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Troubleshooting - No Codes >> Symptoms >> Excessive Exhaust Emissions Or Odors >> Symptom Definition

Symptom Definition

Vehicle fails emission test. Vehicle may also have excessive "rotten egg" smell (hydrogen sulfide) being emitted from tailpipe. Excessive odors DO NOT necessarily indicate exhaust emissions are high.