Question about 2007 Hyundai Sonata Limited Sedan

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Battery good car won't start. Had Sonata 2007 towed to dealer. Car started right up. Brought it home the next day, same thing happened. I waited several hours tried again. Waited till next morning car wouldn't turn over. No choice but to call tow truck. Dealer had it for a week and was unable to replicate the problem, so I brought it home . . . again. Hasn't happened for five day, but I've lost confidence in this car. Where will I be, the next time it happens? Any one who experienced this problem and solved it? Love this car otherwise, no problems ever.

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  • carhob May 11, 2010

    could be corrosion build up on single wire plug connector at starter solenoid,came upon that problem often but on older cars!



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So sorry to hear about your issue... I feel your concern!... The problem is definitely in the 'Starting System Circuit'... difficult to isolate unless the cause 'stays broken'... Possible causes, Wire Harness Connectiors/pins, Ground(s), Fuse(s), Relay, Ignition switch contacts, GREMLINS!... Agravating for you AND the technician! Believe it or not, technicians BELIEVE you!... they REALLY want to find the problem and FIX it! (at least most of them). The bottom line?.. it needs to stay BROKEN before we can find the problem and FIX it.

Posted on Oct 04, 2009


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2011 hyundai sonata won't start. battery seems fine. loud clicking/knocking when i turn the key. would it be the starter?

Unusual for the starter to fail on a one year old car.
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2008 T&C randomly won't start

I've had the same problem. The dealer is trying to tell me the inverter needs to be replaced because of me charging my Iphone in the van. They already tried replacing the Win Module but that didn't work.

Jun 22, 2012 | 2008 Chrysler Town & Country

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I have a 2007 Ford Expedition XLT. I came home and park it. When I went to get back in it, however it wouldn't start. Its turning over but won't stay cranked.

Same thing happened to my '07 expedition EL Limited. I called CAA and towed in to the dealership. As per their diagnosis, the Heater Control Module malfunctioned/tripped. They reset it and asked me to leave the car overnight outside the dealership in the middle of winter so they can test it again the next day. Next day, car was ok. The tech said probably the Heater Control Module is the problem.

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To reset this, pry open (use your fingers) the lower cover of the center console below the a/c, heater, temperature buttons. Then lift up the cover of the whole center console and you will see wires connected to this two (2) connectors. Unplug the first one on the right (blue in my car) and re-plug it after about 10 seconds. Wait for about a minute then try to turn the ignition ON then START.

It happens twice again already since it came out from the dealership but I was able to reset it.

But the advise of their tech is to replace the Heater Control module and it will cost me about $500.

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Car will try and turn over but never actually starts.

You need fuel, compression and a spark for a engine to run, with out any of these it won't run. Oh and these things need to happen at the right time. Check you have fuel at the injectors, then check you have a spark at the plugs. The compression is a little more difficult so then you need a mechanic.
Good luck

Jul 09, 2010 | 2004 Kia Optima

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My 2003 Sonata turns over but will not start until

I'm sorry to hear about your situation. I may be able to offer more assistance than what's below if you can answer the few questions I have in the next paragraph.

Presumably, you somehow got the car started after pumping the gas two to three times. Let's start with that. What was it necessary for you to do to get the car started? When you were able to get it started, did it crank normally, slowly, or quickly? Does the problem only occur after waits of a certain time after driving the car? If you can think of anything all no start the events have in common (temp, humidity, whatever) please add that as well.

First, I'll say that I find the weak starter diagnosis dubious. Hyundai has very few starter problems. but still it's possible.

If you've got the original battery in your car, I'd be very suspicious of the battery. How did you conclude the battery was good? If it's new, that's a pretty good (although not perfect) indicator. On the other hand, if it was based on a handheld computer tester, I'll just say that they're not always accurate. If you're not sure if you've got the original battery in your car, here's what it will look like: it'll have a black top and white case (possibly hidden inside a black plastic shield to keep the heat away), and will have "Solite" written on the white portion in big red letters. The warranty on the original battery is 3 years-- free replacement after two years; you'll need to pay 75% of the parts between two and three years. It's likely you're over 3 years-- it'll depend on the actual in-service date. If so, and you need a battery, you'll be paying for the repairs wherever you have them done.

The alternator is another possibility, as are some other less common electrical issues. I'd expect that the dealer did a system test and found nothing wrong. Again, if they used a handheld electronic tester-- all Hyundai dealers have one of these; it's a required special tool-- it'll sometimes show a weak battery as good or vice versa.

Another possibility is your your ignition timing has a problem or your fuel timer has a problem
Here's what I'd recommend:

If after reading the above, you think it's the battery, just put one in. They're relatively inexpensive and installation is easy-- just make sure you don't hook it up backward! If the problem happens again, call roadside and have it towed to the dealer.

If you're still doubtful about the battery, put a set of jumper cables in the car for emergencies when you need to get it started right away, and, if you can, call roadside assistance when it happens again.

Finally u can narrow down your problem but still u could not narrow down your problem speak with the service manager of the dealer. Tell him how disturbing and disconcerting it is that your car will sometimes not start but they've been unable to find a problem. If they'd like to check it again, offer to leave it there a few days if they think it'll help them.

May 07, 2010 | Hyundai Motor 2003 Sonata

1 Answer

All the lights came on and the car just died

I assume that when you say all the lights came on ... refers to all the dashboard lights and NOT your headlight/tail lights? I found the following reference for a 2013 Ford Focus:
On my way home on the freeway, my oil & battery light started flickering on and off at the same time and as it did the car was stalling out. I put my 4-way flashers on, slowed down and moved to the right lane as a safety measure. After another few miles both lights came on and stayed on and the car shut down. I pulled over to the berm, waited a few minutes, tried starting, it started and drove home with no issues. I drove to work the next day with no issues. On the way home things started happening again, the car shut down, but this time after waiting a few minutes the car never started. I had it towed to the dealer and they found that a wiring harness was up against the throttle body and wore through the protective insulating tape, then the wires causing the problem.
Another cause might be that a relay in the fuse/relay box under the hood broke
Good luck in your troubleshooting

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Issue: ABS & ESC would not turn off
Solution: Replaced broken speed sensor on tire

Aug 15, 2008 | 2006 Hyundai Sonata

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