secondary air injection system trouble
I have a 98 SL500. Ocasionally the check engine light comes on. I have a code reader and the error mesage is "secondary air injection system malfunction". I can reset it and it will be fine for a while. Have not noticed any pattern of when it comes on, maybe at idle when humidity is high. I've heard this can be very expensive and hard to solve. Anyone know of a good system check to isolate problem.
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