Kia Optima: If the engine doesn't turn over or 
turns over slowly - If the engine will not start - What to do in an emergency - Kia Optima TF 2011-2020 Owners ManualKia Optima: If the engine doesn't turn over or turns over slowly

1. If your vehicle has an automatic transaxle, be sure the shift lever is in N (Neutral) or P (Park) and the emergency brake is set.

2. Check the battery connections to be sure they are clean and tight.

3. Turn on the interior light. If the light dims or goes out when you operate the starter, the battery is discharged.

4. Check the starter connections to be sure they are securely tightened.

5. Do not push or pull the vehicle to start it. See instructions for "Jump starting".

If the engine will not start
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If engine turns over normally but does not start
1. Check fuel level. 2. With the ignition switch in the LOCK position, check all connectors at the ignition coil and spark plugs. Reconnect any that may be disconnected or loose. 3. Check th ...

See also:

1. TCM Connector and Terminal Function
...

Accelerator Pedal Repair procedures
Removal 1. Turn the ignition switch OFF and disconnect the negative (-) battery terminal. 2. Disconnect the accelerator position sensor connector (A). 3. Remove the mounting nuts (B) and ...

High Voltage Shut-off Procedures
High Voltage Shut-off Procedures     Be sure to read and follow the “General Safety Information and Caution” before doing any work related with the high voltage sys ...

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