Hello,

After my 2007 ES350 was not driven for 2 weeks, multiple lights are coming on intermittently. Please disregard tire pressure as that was before.

Is it wheel speed sensor since it is intermittent or rust since car was not drivem?

I am taking car to Costco soon to replace tires, will they be able to diagnose it?

 

Check your battery . sounds like it is going bad. What is the Voltage. It should be 12.6 V at the battery with the engine off.

 

What he said. It is most likely random lights triggered by low voltage from a weak battery. Just get a new battery from Costco.

 

I wonder if I need to unplug small cigarette lighter charger when I don't use car for prolonged periods. Is there a one in 2007 ES that stays powered when engine is off?

 

The lighter outlet does not have power when the car is off.
If you want to use a solar battery maintainer you need to connect it to the battery. Then run the wires from out of the hood into the driver or passenger door and place the solar panel on your dash. I have one and have used it on several cars this way.
However you should first replace your battery.

 

Of course, will do. Is it as easy as dropping new battery in and reconnecting it?

 

Easier. 2 small spring clamps (like on jumper cables) attach to your battery posts. A small cable connects to the solar panel. You can connect or disconnect the whole thing in under a minute.
Many of them have a quick connection in the wire between the battery clamps and the solar panel. So you can leave one half connected to the battery if you want.
You do have to open the hood and stash the wire somewhere.
I find it just as easy to unplug the whole thing when driving so I don't have to worry about it moving around under the hood or getting lost. I usually run the wire out the rear of the hood, along the panel gap to the door and inside the car to the dash.
Amazon has many available for under $40.

 

Went to replace battery but it was good. I still have those lights come and go, possibly triggered by road bumps. Loose connection? Lights started first after I asked mechanic to see if he can fix very slow timing cover oil leak, he decided to try composite/glue over the leak area. That did not work but now I wonder if the issue is related. Would OBD scanner be able to provide more info?

 

0Changed the battery, for a day no lights on. Today they came back.