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March 11, 2008 11:59 AM Subscribe
Car Trouble Filter: Check engine light goes on. Mechanic says it the catalytic converter, cost = $1,500. Then the check engine light goes off, on its own. What should I do?
posted by jujube to grab bag (18 answers total)
I have a '99 Subaru Legacy. About 100,000 miles, maybe more. The check engine light came on, and I brought it in to the mechanic the next day. He says it's the catalytic converter. Apparently there are two in the Subaru, and he also needs to put in a new oxygen (filter? detector? I forgot, but something like that) because he can't replace just the catalytic converter. I could just replace ONE of the two catalytic converters, but according to the mechanic, the second one could go and take the new one I replace with it, which would mean that I might end up having to replace both again. . .
Here's where it gets convoluted. I had JUST brought the car in for smog inspection (legally mandated where I live), just a few days before the check engine light came on. The car passed the inspection, no problem. So I find it weird that the catalytic converter could be malfunctioning, and still pass inspection just a few days ago.
And even more complicated. . . So the day after I get the quote from the mechanic, the "check engine" light goes off on its own. Huh? Now I'm more confused. Two days after that, the check engine light comes back on again.
What's going on? Any mechanics or someone with more car knowledge out there?