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CarGurusMar 5, 2013 - My Hyundai Sonata won't start, everything comes on when the key is turned but no ... it is in park and until I jiggle the shift until the light does come on it will not start. Was in ... My 2009 Sonata has been "perfect" with no issues.
Do you hear a click when operating the key ? if not I would suggest perhaps it is the starter solenoid not making contact and powering up the starter, the quick check is to employ the help of a friend, locate the starter ( make sure the car is out of gear or in park ) get your helper to hold the key in the start position and you tap the starter with a hammer or the like, if the engine bursts into life it's the starter, if not the chances are it's the switch, Be careful when doing this and be sure to keep clear of the fan an pulleys.
Access to the starter is from under the vehicle.... probaly on the back towards firewall and must be over exhaust (looking up from under it) and attached to transmission. REMEMBER: disconnect battery negative post cable 1st! If you want to be certain it is starter first either while it's still connected to battery, go under and check if you have constant 12v on main terminal and switch terminal should have 12v ONLY when key is "cranking"... hold key long enough to test for current. If all is as should be, continue to remove starter after disconnecting battery. Bench check both old (to be sure its bad) and new (so you don't install a defective one).
Our Hyundai Sonata 2009 will start itself when you halfway turn the key and then grinds it, like the starter is stuck, as if you are holding the key in the starting position. It does it in Park and Nuetral.
I assume your motor crankshaft is not 'seized' or otherwise locked up.
Check your battery terminals are clean and firmly attached,
Check battery ground connection is securely connected to the chassis and the motor/chassis ground connection is intact.
Check for 'click' sound as starter solenoid is engaged when Ignition sw set to 'start' position.
If no noise from starter motor, and +12v applied to the starter engage solenoid terminal, then the starter motor may be faulty.
Will the wipers work with the key in the run position? If not, it's the battery. Try a jump start. If the battery's ok you need to measure volts and amps at the starter to check for clean connections and internal failures.