SOURCE: Hyundai 2001 Accent Code - P0130
I think this is the O2 sensor - It will run fine but you might notice your gas mileage slipping and will not pass emissions.
SOURCE: Poor Fuel Mileage 2006 Hyundai Sonata 2.4 motor
I don't know from where you bought the car but do you feel certain that typical causes such as fouled plugs or clogged air filters are not at fault?
Most dealers, even the shlocks don't normally skimp on the simple stuff but who knows about a private source?
That does seem low, especially the city numbers. I don't think Hyundai is any leader in gas mileage but they are better than what you are getting.
SOURCE: my 2000 hyundai acc
Possibly coils check compression make sure the plugs are the proper ones some engines are particuler about the plugs
SOURCE: 2003 Hyundai Accent with Engine skip...error code P0300 P0301
I have seen coil packs go bad on several Hyundai Accents, the coils will do exactly what they are supposed to (hence your check with an ohm meter), however, the coils short through the outer casing. Try running the car when it is dark out and spraying the coil packs with water. Listen for clicking and watch for arching from the coils to any metal around them. Look for abnormal detonation marks in the outer casing. My guess is you just need a set of new coils. If the Problem is worse in the rain then you have found your problem. Remember, If your car has been misfiring (as noted by the engine codes you listed), the EGR valve can become clogged and damage can be done to your catalytic converter as unburned fuel detonates inside it (keep an eye out for O2 codes in the future). Also, your new plugs can become fouled, be sure they are clean once you fix the problem. Checking your plugs can also be a useful indication of which cylinder is misbehaving.
SOURCE: 2001 Hyundai Accent high rpms on highway
you need to make sure your trans is shifting to high gear. if not thats why your rpm's are to high.
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