Turn igintion switch, engine won't start
try to clean both side of the key where the little resistor (some people call it chip)with rubbing alcohol
or try your spare key
you can check the resistor with DVOM (digital volt,ohm meter)
put black lid on one side and red on the other side while set on ohm or kilo ohm
if it shows it is open ,you need new key
don't let lock smith guy or dealer say it need to programmed
find the right value of resistance and get on eBay
all it is, just resistor to complete the vat circuit,and tell pcm to send the voltage to your starter solenoid
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