1988 Ford Taurus Most Likely Cause Dtc 41

1988 FORD TAURUS
89,000 MILES
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WHAT IS THE MOST LIKELY CAUSE OF A DTC 41?
Feb 4, 2013 at 12:40 AM
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CARADIODOC
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41 oxygen sensor circuit indicates system always lean

Check for vacuum leaks, low fuel pressure, a leak in the exhaust system ahead of the oxygen sensor, restricted injector due to varnish buildup, and a leak in the fresh air tube between the mass air flow sensor and throttle body.
Feb 4, 2013 at 2:16 AM
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