Question about Hyundai Motor 2004 Sonata

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Hyundai sonata 2004: Check engine light keeps going on because some times the engine hesitate. otherwise it runs good and strong even that the light is on.

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Have it properly DIAGNOSED!... If you don't have an OBDII scanner, then you can't help me help you.... no QUICK fixes here friend. Easy answers went the way of the diansoar... sorry

Posted on Mar 25, 2011

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2005 hyundai sonata. The check engine light is on. The rmp gauge keeps going back to zero. The car is starting to hesitate.


When a 'check engine light' (MIL=Malfunction Indicator Lamp) is turned on, there is a DTC (Diagnostic Trouble Code) set/stored in the ECM/PCM (Engine Control Module/Powertrain Control Module). This code identifies which engine management system component/function experienced a malfunction. Once you pull/read this code, you may begin diagnosis.

Aug 31, 2011 | Hyundai Sonata Cars & Trucks

1 Answer

Have a 2004 hyndia sonata just repaced fuel filter after engine light came on..worked fine for 1 day now engine light back on and runs rough at times doesnt start right away


You are describing low fuel pressure (fuel pump) problem. When you say you replaced the fuel filter, where did you find this filter on the 2004 Sonata? The problem, there is no Fuel Filter, per se, there is a 'SOCK' at the bottom of the fuel pump assembly which serves as a filter, inside the fuel tank. By the way, you mentioned the Check Engine Light came on. Did you scan for any codes in the computer (ECU)? If you did, what were the codes?

Feb 07, 2011 | Hyundai Motor 2004 Sonata

2 Answers

2004 Sonata almost stalling and check engine light is on


Cleaning the fuel line was a good idea although it will need time to take effect. Another related problem could be clogged or stuck fuel injectors. Another thing to do is pull the spark plugs. Old or dirty spark plugs also contribute to engine sluggishness. Lastly, bring the car to an autoparts store that features free diagnostic tests. If there are any error codes stored on the car's computer, it would give you an idea where to look for any electrical problems.

Aug 31, 2009 | 2001 Hyundai Sonata

3 Answers

Check engine light is on intermittenly during driving


Well to tell you the truth with so many sensors you need to put the car on a scanner to fix the problem.You dont want to be changing part after part and not fix it,can get expensive.Get it scanned pay 40 to 70 dllrs get a report and you can change the part.But open you hood and look around it can even be a vacum line.Good luck.I can guide you thru changing the part.

May 27, 2009 | Hyundai Motor 2003 Sonata

1 Answer

Wants to overheat even when fans come on


it sounds like your fans are not working. you should check your owners manual and locate the fuse for the engine fan and check it. now if the fuse is good Bring the car to your local repair shop and have this problem checked out. asap

Apr 21, 2009 | Hyundai Motor 2004 Sonata

1 Answer

Cam sensor misfire


If the mechanic pulled a code for a cam sensor, it is very possible that as it gets hot, the cam sensor starts to produce a degraded signal and the engine progressively runs worse. I'd replace the cam sensor without hesitation. The trip to the dealership will cost more than taking an educated shot at the cam sensor.

Mar 17, 2009 | Hyundai Motor 2003 Sonata

2 Answers

2004 Sonata stalls out for no reason then won't start


hi there, i have a 2003 sonata and my car did the same. it stalled and the engine light stayed on but managed to get going again. i took it to Hyundai and it was the crank angle sensor. it needed replacing at NZD180.00 with 3 hours labour to do it. evidently they remove the front of the engine and cam belt etc. the workshop at Hyundai did it and charged 3 hours, not sure if that was excessive or not.

Feb 05, 2009 | Hyundai Motor 2004 Sonata

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