Question about 1997 Ford Explorer AWD

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I have engine code 443 saying slow response os sensor does this mean i have to replace the sensor this is on 1997 ford explorer truck. i also had a vapor leak code so i replace the gas cap will that solve the problem.

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Most likely if is going to be a bad o2 sensor, especially in a car that is from 97. About the vapor leak, it could be the gas cap, put it could be a leak anywhere in the EVAP system too. If you fill you gas tank with the car running it can set the same code, so it may not even have a problem at all. The best way to check an EVAP leak is with a smoke machine.

Posted on May 15, 2010

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