If the Check Engine Light illuminates, indicating a problem with the front oxygen sensor, but the sensor tests okay, reprogramming the engine's control computer should fix the problem. Then, the Check Engine Light will no longer falsely illuminate and the acceleration, particularly from a stopped position, will be smoother.
PCM software update to correct fause oxygen sensor code on Hyundai XG300
Average mileage: 88,000 (56,000–120,000)
Engine affected: 3.0L V6
1 model year affected: 2001
3 people reported this problem
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2001 Hyundai XG300 - 3.0L V6 56,000 mi, Visitor
Car stalls when 1st start up and when passing other autos After cat warms up problen not as bad .