it could mean any of these but if tell me how the car is running i may be able to help you .
The possible causes of this issue are as follows:
I would check for an obstructed fuel filter or fuel quality issue here first as these are the most common issues
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What is the Letter in front of the code? "P"
Are you sure the code is a 1139 and not a 1138 be cause a 1139 is not listed in my code book,but a 1138 is which means heated oxygen sensor is not working.hope this helped brad
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