When key turned, makes 1 click,with no turnover. Frequent attempts eventually leads to success. Happens after car sits for a while, and only in warm weather.

Check the heavy cable from battery to starter is ok. Put current directly onto the starting terminal on starter motor. If nothing happens the starter is dead. Make sure the battery isd charged

YOUR IGNITION SWITCH IS BAD OR YOUR CABLES ARE LOOSE

You need to get your starter reconditioned. It sounds like the brushes is worn or you have a faulty soliniod

You need to find out what the error code is - Service engine soon means an error code was generated.

With the problem you discribed, it sounds like a coil problem. If a crack has developed in the casing, the crack size changes with temperature changes. Also make sure that the wires are in good shape.

The problem you have is with your starter motor, or the wiring involved with the starter motor. I assume the battery is in good condition. What you have in the starter motor is 2 sets of windings, 1 is to throw the pinion out to contact the flywheel. The second is to turn the starter motor to turn the engine over to start. The 1st set are activated by pins that can burn out over time. I do not know the age of the vehilce and thats why this is more of a guidleine, than a 100%diagnosis. If the starter is good, then low current will cause the 1st set of windings to kick in, but the 2nd set will not have enough current to rotate a stationary engine. Firstly, make sure that the battery is good, and that the earth wire and the positive feed wire to the starter are good. If good, then remove and replace the starter,
Note : becuase it only happens rarely, i am going to lean towards the starter fault, as this can tend to become more frequent, as the pins wear more and more,

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When the bushes in a starter get worn, it can cause the armature to rub on the magnetic poles (poleing) This can cause the starter turn slow or not at all
The sintered metal bushes are like bearings. Not to be confused with carbon brushes which are the electrical connectors.
When a starter clicks, it is the solenoid you can hear.supplying power through the brushes.

A starter that is poleing,often stops in a place where it isnt rubbing, and works fine the next start.
There can be other problems with a starter , perhaps one of the brushes is sticking, or the solenoid.
When it happens a tap with a hammer on the starter or solenoid, while a friend turns the key, is enough to get it working( this isnt a fix but might get you started in an emergency)

There is also the possibility of a loose or dirty cable connection, from when the new battery was installed

Based on the information that you have provided me, my attention is now centered on the ECT Sensor (Engine Coolant Temperature). This sensor provides information to the ECM to richen the fuel mixture on start up and also to lean out the mixture as the engine warms up. Very similar to the old fashioned choke in operation. A cold engine requires additional fuel to start, while a warm one does not. This matches your situation of a cold start versus a re-start and also explains why you are having to cycle the start sequence several times to fire the engine. Those cycles are finally providing enough fuel for start up.

Check with a local auto parts outlet to see about having the ECM read for a memory code related to the ECT. Most of the stores will now do this testing for free.

Let me know if this helps you out or not. Thanks.

It sounds like your starter/starter solenoid is going out. I suggest replacing your starter. (starter and solenoid come as one unit)

first MAKE SURE THE CAR IS COOL BEFORE TAKING OFF THE RADIATOR CAR!!!!!! failure to do this could result in major burns to the face!!! then check the radiator fluid make sure it is topped off also make sure that you arent just puttin water in the radiator make sure and put some actualcoolant the radiator should be filled with a 50/50 mix of water and coolant

if the problem continues you might want to take it to a shop

Make sure you battery is fully charged, and make sure that your alternator hasnt went south...

Battery or Alternator could be junk...