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what are the chances Check engine light 850

The check engine light is on the bottom row on the right side, next to last. It should light up when the key is turned to position II. If you disconnect the battery, that will clear the codes and reset the entire system. A slow responding O2 sensor can be stored without triggering the CEL. After 3 or more of the same error, the CEL will then turn on.

Klaus
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There is no present time, just the past and future






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