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Hyundai Questions

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even with temp control on hi (auto climate control)

do the seals get changed

what do these codes mean and how do i fix P0170, P0171, P2195

I was told that I need to replace this part and wondered how long I can wait to do this and what if any damage will be caused til I replace it.

I have a 2 yr old Hyundai Santa Fe. Up to the last 6 mos., I got 26 to 28 mpg (higher for longer trips). Now I am getting 20 to 23. Regular oil changes, air/fuel filter changes per requirements. Is there an additive that will actually work and help improve mpg?

cannot replace now but need car. if compressor is removed can belt bypass that and car still run?

When a start my car is fine. It is quiet and all normal, but as soon as it reaches 40mph and the RPM get higher, the engines gets loud like it has turbo charge or something. I do not remember the engine been loud before, but I have noticed it lately. No leaks in the exhaust, no engine light, no overheating, maybe eating more fuel than before. Car runs fine, but I do not know why the engine and the rpms get loud especially on the highway is when you hear it the loudest (75mph or higher)

was told rear oxygen sensor needs to be replace but after driving for a while check engine light comes on again.

I can drive around town and not get the CEL to turn on. If I do highway driving, the computer will throw a pd1166 and then on my next trip (the engine must be restarted) the CEL will light up with a p1166 and a pd1166. No other codes are popping up. Could this be the MAF, is there a way to test the MAF. The same code was being thrown when the crankshaft seal failed, but it would happen almost immediately.
Any ideas are greatly appreciated. Thanks Wayne

my engine wants to stall

Who can repair this unit in the Area. And are there replacements in the area.

battery light indicator blinks on-off quite several times and stops dead and the dashboard lights and headlights got dim while driving and the air conditioner heater blows dying heat air even if the temperature control setting is set maximum not full blast occurs both on-off for a short time

On this site I've seen the note that on some cars it is a good idea to replace the slave cylinder when the clutch is replaced in order to save costs over having it done later. Is this necessary on my car? I received one quote in which the slave cylinder was included without my having asked for it to be.

The ignition illumination light does not come on when I open the door

I heard a loud noises from engine like tappet or valves starting cold. I went to Sonata dealer. They checked it out but could not find anything to report. Today again when started the engine did not make that loud noise only the tappet/valves are still clacking until driven a few 100 feet. Then it's quiet operating normally. I asked the Sonata serv. rep. if the could check the codes but they said it would not show up. I did read one paragraph in repairpal that stated it could be the timing belt tenshioner.
I have 58,269 miles and the both belts were changed because of this year model -last one from North Korea & not Alabama.

I have a 4 cyc single exhaust 2004 Hyundai-
I have one 02 sensor on top of the exhaust manifold; another one just below the flange of the exhaust manifold where the exhaust pipe connects to the exhaust manifold.

OBD codes 421

The check engine light is one with a code 0451 that refers to a VAC sensor, please help

I believe the diagnostic reveals a P0501 code indicating the VSS is the result of my speedometer and mileage not working.

Know my check enginine light is coming on slow responce to bank one sencor

In the last year or so, my car makes what I'd call a squeaking/bubbling noise when cold. It's not very loud or anything, but it's noticeable -- even more so when the clutch and/or gas are depressed. This only happens when the car is cold, and the noise goes away in 5 minutes or so -- by the time the engine temperature has stabilized

I recently had a 90k service -- all fluids were flushed, a few hoses were replaced -- but the sound still remains (although not quite a strong as before). Any ideas?

checked fruse -- ok

have only one key entry. no remote. how can i get in if the door will not open

what is a throttle actuator

check engine light, burns more gas and idles sometimes

could it be a weak coil. The copil is on cyl 4 but I think it serves cyl 2 also.

Runs okay when not under a load

the keyless entry fob problem when pressing the lock button the hazard light don't blink

When I climb a hill, I am huffing and puffing. When I merge onto a freeway, I cannot excler fast enough.

I have extended warranty on the vehicle Can anyone tell me why is the 2.0 turbo,Sonata is having a serious issue with the Electric Waste gate actuator sticking....twice in 3 months.3 wks ago my coil went bad.If I did not have Extend.. Warranty I would have had to pay for a rental for 3 days... $100 thats B>S>If its the Manufactures dilemma why dont they pick up the cost.Has anyone else had that problem w/the turbo?