Car Cranks but wont start after dead battery - immobiliser?

Hi Guys and Gals,

I have Chevrolet Kalos (Aveo in the states I think) 2008 1.4se


Like an idiot I left my keys in the ignition for 2 days, this caused the battery to die.
So I charge the battery up. Now it cranks but wont turn over. Could it be the immobiliser stopping it form working? It worked fine before.
When I put the keys in ignition the the alarm light on the dash flashes quickly, I don't think it used to before?!


I've tried disconnecting battery, leaving key in ignition but still no luck!!
Any ideas guys?


Shall I buy a diagnostic machine for £20 see if it is the spark plugs or fuel pump? But I guess this would be a coniscident if it was, as it worked fine before the battery drain.

I have also tried disconnecting the battery for an hour and reconnecting it.

Any help would be greatly appreciated. Hell, I'll even send you a hamper to say thanks if you get it working ;)

Is it possible you overcharged the battery, and perhaps damaged something? In any case, did you check the fuses and relays?

Hey, I did not know overcharging was a thing!

How would I check this?

I pulled out all the fuses and all the metal bits seem in tact, so I think they are all fine. As for the relays, is there an easy way to tell?

I have put a multimeter on the battery and it reads 12.4V and does not drop below 10V when cranking

Quote:

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Originally Posted by alexjb1989

... I have put a multimeter on the battery and it reads 12.4V and does not drop below 10V when cranking

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The battery is fine.

Perhaps what you mentioned about the immobilizer is correct, and it needs to be reset. There is usually some simple 'trick' to reset these things - on one other vehicle it's locking with the fob, and unlocking the driver's door with the key. Try calling a Chevy stealership and see if by some chance they know the manual reset procedure, and are willing to share it with you.