Question about 2000 Hyundai Sonata
The best thing to do is, remove and clean all the sensors and connectors I have listed below.
A code P0125 may mean that one or more of the following has happened:
The simplest thing to do is to reset the code and see if it comes back.
If the code comes back, the problem is likely going to be the result of the above causes (faulty thermostat, faulty ECT sensor, or a low coolant level).
Other ECT sensor and circuit related DTCs
A code P0171 may mean that one or more of the following has happened:
A lot of times, cleaning the MAF sensor and finding/fixing vacuum
leaks fix the problem. If you're on a tight budget, start there, but
that may not be the fix for certain. So, possible solutions include:
Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with some vehicles where the MAF sensors leak the silicone potting material used to protect the circuitry.
Posted on Oct 27, 2012
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Posted on Jan 02, 2017
SOURCE: No pick up after 45 mph
it could be in a limp mode which would explain it not going over 45mph even though you replaced o2 sensor you may still have to take it to maindealer to reset brain memory.
Posted on Feb 22, 2009
What is 'cadalis' code? ... catalytic converter efficiency below threshold? If so, it's not the O2 sensor. The converter is worn out if the code is catalytic converter efficiency. Sorry, expensive repair.
Posted on Jun 06, 2009
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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