keeps failing for comprehsion on 2002 Volvo C70

I have had my car fixed for the fail They have told me to drive it at least 200 miles I have done that and still fails for comprehensive What is the problem

Asked by for the 2002 Volvo C70
1 answer
These vehicles need to be driven until the engine computer can perform a check of the entire emissions system (called a "Drive Cycle"). Some cars can achieve this in a short time, other take much longer. I suggest you take this to a Volvo shop, they will be able to perform this test drive in a much more efficient manner than you can. Learn more here:
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