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Check Engine Light Diagnosis

(2005 Hyundai Tucson)
in Pompano Beach, FL on October 23, 2010
My check engine light has been on, I've taken it to 3 different shops and gotten 3 totally different answers, with repairs ranging from $0-$1800. The latest was the actual dealer, who charged me $200 for 2 hours of labor just to tell me that I need to replace both fuel rails, clean all 6 fuel injectors, a tune up and plug wires, ($900 total) and THEN we can look at the cat converter to see if it needs replacing.... Does this sound right??
Displaying 1 answers & 2 comments
Popular Answer
on October 24, 2010
Nothing is more frustrating than getting answers from three different places -- that do not have commonalities!

Without testing the car myself, I could not really tell you what the answer is. My GUT tells me although the tune up, plug wires and injector cleaning are probably great services to perform for your Tucson that will improve performance, they probably do not specifically relate to your problem. I'm not sure why the fuel rails need replaced specifically, but it could be a cause of your issue.

Do you have any notes of what codes were in the processor? They should be able and willing to tell you this.
on October 24, 2010
Thank you, yes it is very frustrating :) The codes they gave me were: P0430/ P0420/ P0301/ P0303/ P0305/ P0300. My car has 99,000 miles on it, I get regular oil changes.
on October 24, 2010
OK, well, you do have misfire codes. Cylinder 1, 3, 5 and random misfire (P0300). The P0420 and P0430 are both catalysts being inefficient as measured by the oxygen and catalyst monitor sensors. My guess is they are recommending fuel rails because of excessive fuel getting into the engine, and possibly getting through to damaging the converters. P0420 and P0430 are not often things that improve (once your catalytic converters do not perform efficiently, they generally do not "fix" themselves...).

I do recommend another opinion, as seeing the car, hooking up the GDS diagnostic tool that is Hyundai proprietary and performing testing is really the only way to know anything for sure. Good luck.
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