20 Most Recent 2007 Kia Optima Questions & Answers

Check the wiring and socket inside the headlamp. And ONLY USE 55W BULBS! The headlamp bulb sockets are junk on the 07 optima. My 07 tried to light itself on fire....multiple times. Finally ripped the inadequately designed plugs out and replaced them with ceramic sockets I ordered online, 2 sets for like $5 on Amazon. Haven't had an issue since I don't know what plastic Kia used, but it barely handles the heat from the 55 watt bulbs the manual calls for. There are higher wattage bulbs on the market. Do not use them. They will melt the plug plastic.

I also have tpms sensor issues on a 07 optima. They are kind finicky, a variance of more than like 2lbs or so across tiers sets the light. It's possible the sensors have low batteries, unfortunately the only way to gain access to the sensors is to take the tiers off the wheel, and even then, I think the electronics are sealed in the sensor unit. I just keep an eye on my tire pressure and ignore the warning light. All my cars before this one didn't have that feature, so it's no big loss, for me anyways...

A kill switch, or immobilizer, disables the engine from starting, usually by means of breaking one or all of a few circuits. The fuel pump, the ignition coils, the computer, or the starter itself. An immobilizer is usually part of an alarm system, but back in the day, people would hide a physical toggle switch on the vehicle somewhere that broke the power wire running to the fuel pump. Yes, car batteries can go flat if they have been sitting a while. That does not mean the battery needs to be replaced, but most likely needs reconditioning. Replacement acid is available at auto parts stores, and decalcifier charging units and all over the internet. Do your homework before attempting to fiddle with a battery that can put out enough amperage to melt a craftsman wrench.

The v6 also offered in the 2007 optima

It would help to know what kind of "won't start" you mean. Is it just ticking? Low battery voltage. Considering it started after getting your phone, probably not that. Is it cranking slow and not trying to catch (where it spins faster as the engine is firing but not fully catching and entering a run state)? Is there nothing at all, just shuts the accessories off and does nothing, no click, tick, hurk, jerk? I had a Malibu that did not like starting too fast. As in if you flipped the key switch straight to start the fuel pump wouldn't pressurize properly or something. But if I turned it to on, gave it a second (you can usually hear when the fuel pump stops running once the system is up to pressure) then hit the starter it kicked over just fine.

LOOK UNDER DASH JUST BELOW STEERING COLUMN.YOU WILL SEE THE 16 PIN DATA LINK CONNECTOR.

It has to be the switch then.

There are Three things that cause this code other than vacuum lines and hoses, the fuel tank pressure sensor, monitors the pressure in the fuel tank and times the vacuum decay, The canister purge valve and the canister close valve, these are all maid to be tested with a scanner but you can Do this, locate the charcoal canister and find the valves have someone turn the switch on while you feel and listen for a click. You can also check with an ohmmeter just check for continuity. If the fuel tank is rusty on top there could be a pin hole in it. I hope this helps. Take care.

it's attached to the fuel pump assembly mounted inside the fuel tank, accessed through an inspection plate in the trunk.

Check auto locking relay unit ,probably needs replacing.

Then you have a weak connection or the battery does not have enough cranking amps for the engine .

Sounds like it could be your battery terminals not making great contact with the battery posts and when you put the jumper cables on they are making direct contact with the terminals therefore supplying enough current to turn the starter. Make sure you clean the battery posts and terminals thoroughly (I use a stiff bristled brush and pepsi) if its still doing it then my guess is either the battery wasn't tested properly or your starter is on its way out. Tap the starter many times on the back/bottom then try starting it (without cables) if you get more activity then its your starter and you should get it fixed ASAP otherwise you'll be stranded one day soon.

the key on 3 pump it doesnt harm computer it is to reset the change oil service lite or set oil life to 0 ----if you have a check engine light have code read most auto stores offer service for free ---to boot computer and clear any codes remove the positive terminal for about 10 minutes then re hook up cable

Rear of the cylinder head on the drivers side.