Question about 1994 Chevrolet K1500

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Service engine soon light comes on when driving on the highway. I can drive around town with out it coming on. Any ideas?

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You may have an oxygen sensor that is marginal in its range of operation.

Go to autozone and they can pull the error codes that are stored in memory of your cars ECM. This will give you more info

Good Luck

Posted on Oct 13, 2010

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