06 Yaris Intermittent Starting

[Yaris21]

Hi everyone, I have a 06 Yaris, 2 months ago i went to start the car, it turned over then died out, tried a few more times to no avail, left car for 10 mins and started straight away, worked fine for a month or so then the same problem, worked fine in the morning but in the evening wont start (turned over the died) left it a few minutes then started. Same thing again today. Does anyone have any ideas. Thanks

[FROSTYBALLS]

Hello Joseph - welcome to Toyota Owners Club

Topic moved to the Yaris club

[Yaris21]

Hi Mike, do you have any ideas about the Yaris?

[Madasafish]

Any warning lights?

Is it petrol or diesel?

I would suggest:

intermittent bad Battery connection.. remove both terminals, clean and retighten.. And if that does not solve it...

[Yaris21]

Its 1 litre petrol, no warning lights. The thing is it starts for one or two seconds each time then dies out, will do this for a while, then if you try later it will start, and work for several weeks, before the same thing will happen.

[Madasafish]

Doess it stop cleanly? Just at once? No misfire?

If yes, it sounds like ignition. As it is intermittent, sounds like a sensor failure.. possibly crankshaft sensor. What happens is the coil inside the sensor breaks, and vibraton makes it open a little , the wires no longer touch and it fails, No ignition. And more vibration and it closes..

The only way to test is by replacement.

[Yaris21]

Hi, yes it stops cleanly every time, if it was some sort of sensor failure wouldn't the engine management light come on. Might it be the immobiliser?