2003 hyundai sonata

There are a few ideas here. The car shouldn't start in neutral, it should only start in Park and with foot on the brake. The are a number of sensors, switches and modules that make this happen. Take it to the dealership.

https://www.google.com/search?q=2006+hyundai+sonata+won%27t+start+in+Park

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try this link.
Car Won Start Copyright AA1CarYOU TRY TO START YOUR CAR BUT IT WON...
or this one.
Problem 5 Engine Cranks But won Start
or this one.
Troubleshooting Car That Won Start dummies

I think it means a lower gear, most vehicles have p,r,d,over drive which is usually in a box, 1,and 2.. 1 and 2 are for driving slower like in snow,or down steep hills.

Start with a complete tune up. Plugs ,wires,fuel and air filter.

ck your battery connections and clean them..Make sure they are not loose when your put them back on.

Vehicles Covered: Hyundai Sonata 2002-2004 (2.4L & 2.7L Engines)

In 2003, Hyundai produced two types of Sonata:
Available engines:
4 Cylinders 2.4L VIN "S", MFI DOHC - see Figures 1 and 3.
6 Cylinders 2.7L VIN "H", MFI DOHC - see Figures 2 and 3.

To differentiate between these types of 2003 Hyundai Sonatas, the VIN 8th digit (Engine Type) will either be "S" or "H" as in the table above.

To locate the Engine drive belt, jack up the vehicle & place it onto jack stands, then slide under the car (toss a cardboard mat down first), then, once under the car, remove the (plastic) engine splash shield. Once removed, the drive & accessory belts are easily observed.



Fig. 1 Accessory Drive Belt Routing 2.4L (4 cyl) Engine - Hyundai Sonata
The "COMPRESSOR" refers to the A/C compressor, and "GENERATOR" refers to the Alternator.




Fig. 2 Accessory Drive Belt Routing 2.7L (6 cyl) Engine - Hyundai Sonata
The Belt Routing on the Left is "With A/C", on the Right is "without A/C"

Inspection - Drivebelt and Accessory Belts

Inspect the drive belt for signs of glazing or cracking. A glazed belt will be perfectly smooth from slippage, while a good belt will have a slight texture of fabric visible. Cracks will usually start at the inner edge of the belt and run outward. Worn or damaged drive belts should be replaced.

Drivebelt Removal & Installation - 2003 Sonata (2.4L and 2.7L engines)

Raise and support the vehicle.
Remove the engine splash shield.
Rotate the drive belt tensioner clockwise to release the drive belt tension.
Remove the drive belt from the alternator.
Slowly release the drive belt tensioner.
Remove the drive belt from the accessory drive pulleys.

To install:

Install the drive belt to the accessory drive pulley.
Rotate the drive belt tensioner clockwise.
Install the drive belt to the alternator.
Ensure the drive belt is properly aligned and seated into the grooves of the accessory drive pulleys.
Slowly release the drive belt tensioner
Install the engine splash shield.
Lower the vehicle.

Here's the best illustration I can find of the Hyundai 2.4L and 2.7L engines - the drivebelt seems to be located on the passenger side of both of these transversely mounted engines.



Fig. 3 Hyundai 2.4L and 2.7L engines - Underhood sensor locations 2002-2004 only

Glossary of Acronyms
---------------------------------
A/C - Air Conditioning
DOHC - Dual Overhead Cam
MFI - Multi-port Fuel Injection

it may be a weak battery if when jumping it the engine didnt spin fast,but i belive the first time the battery was weak and trying to start may have flooded it with the cold weather, have the battery tested and replace it if not good then try holding the gas pedal down to floor like the older cars and hold it until motor gets going then slowly let up as rpms rise, you may have to crank a while.

my 2003 just stopped running as i made a left turn everything works on it lights alarm ect it just wont start now it trys but wonk and one can help please and thank you

look for spark and gas

My Son's 01 Sonata displayed the exact same systems and it was his catalytic converter. The metallic sounds were the converter guts disintegrating.