Question about 1996 Hyundai Accent

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Check engine light but no fault codes

Check engine lights up but there are no fault codes, repair shop replaced flexi and now the light comes on, reseting it works for about 20 or 30 miles then the light comes back on. Shop said it's not their fault and needs the catalytic converter replaced. Is there a way to know if the catalytic converter is causing the issue or am i being taken for a ride? There is a sensor at the top where the pipes come out of the head, then there is a flexi under the engine, the second sensor is next and then the catalytic followed by the tail and muffler way out back.

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Take the Accent to AutoZone. They will scan the code (free) and give you a print-out with a "general" explanation (free). They can also reset it properly.

Let us know the codes and a summary of the print-out. We will advise you.

Answers to your questions:
The sensors at the cat are O2 (Oxygen) sensors.
Problem could be the cat or could be a faulty sensor. My money is on the O2 sensor.

Could be lots of things, like sticky fuel injector...
Don't change the catalytic convertor just yet.
My opinion is that the "shop" doesn't really know and is hoping that replacing the cat will fix it all (my opinion).

If you eventually change out the cat, go to a local muffler shop, not a national chain. They will do the same job for a lot less and not try to sell you other stuff.

Posted on Oct 01, 2009

Testimonial: "there are no fault codes! Reset yesterday only 20 miles so far so good"

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