A few months ago I put a brand new (not reclaimed) catalytic converter into my Focus and ever since then my Engine Management Light has been on. When my mechanic hooks it up to the reader it says there is a problem with the CC, but he's checked and there isn't - it's working perfectly and my emissions are fine.
My mechanic can cancel the light but it just comes on again a few days later with the same error. My mechanic says the car just doesn't like the new CC.
I've got used to ignoring the EML but I worry if some other fault develops I won't know about it because this light is on all the time.
Any advice?
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