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 2011-2018 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
...

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:

Front Turn Signal / Position Light Bulb Replacement
1. Remove the bolts from the headlight assembly. ...

Battery replacement
When replacement is necessary, use the following procedure. 1. Using a screwdriver, loosen the screw on the backside of the transmitter then use a thin tool to pry open the transmitter. 2. Disas ...

Output Speed Sensor. Description and Operation
Description The output speed sensor is a vital unit that measures the rate of rotation of the transaxle's turbine shaft and output shaft, and delivers the readings to the TCM. The sensor prov ...

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