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I got ford 1991 ranger I recently got code 66 on it and code

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hey I got ford 1991...
hey I got ford 1991 ranger I recently got code 66 on it and code 41 I just change o2 sensor two months ago and light hasn't came on til now?
Submitted: 1 year ago.Category: Ford
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Answered in 1 hour by:
3/17/2016
Ford Mechanic: Juan Crespo, Tech Trainer replied 1 year ago
Juan Crespo
Juan Crespo, Tech Trainer
Category: Ford
Satisfied Customers: 1,526
Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
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Code 41 doesn't necessarily mean the Oxygen sensor has to be replaced; it just means the sensor is detecting a lean condition. This lean condition can be caused by several things like air leaks in the exhaust, vacuum leaks in the engine, not enough fuel getting into the cylinders, and more.

What size engine are you working with.

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Juan Crespo
Juan Crespo
Juan Crespo, Tech Trainer
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Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European

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