FAILURE OF THE OXYGEN SENSOR, PCV HOSE (YJ ONLY), TRANSFER CASE VACUUM HOSE AND /OR FUEL TANK VENT VALVE BOOT MAY CAUSE THE VEHICLE TO BE IN VIOLATION OF CALIFORNIA STANDARDS. IN ADDITION, THE EXHAUST MANIFOLD MAY PRODUCE AN EXHAUST LEAK NOISE. TO CORRECT THIS CONDITION, DEALERS ARE TO REPLACE THE THE FAULTY COMPONENTS WITH THE NEW EMISSION SERVICE PACKAGE. *TW