Question about 1991 Chevrolet S-10 Blazer

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Service engine soon light keeps coming on

I am suspicious of the oxygen sensor, but I don't know where it is on the motor

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Its not on the Motor.. Its on the exaust pipe.. Sometimes More than one.. Not sure how many that 91 has..

Posted on Mar 10, 2009

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Engine Service Soon Light On code P0154


Error Code: P0154
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Heated Oxygen Sensor (HO2S) 1 , Bank 2 - No Activity Detected
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you need to change the oxygen sensor. it will soon cause you problems. after you need to take it in to  erase the code.

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