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Error Code List - Stomp Test OBD1
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04-16-2006, 04:14 PM
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biorjin
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1221 means the o2 sensor itsef is malfunctional, 1222 means the o2 sensor reading is out of range, in other word, you car is running either too rich (o2 reading is higher than 1) or too lean (lower than 0.1)
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