Question about 1998 Oldsmobile Achieva
Can you please tell me what part was replaced on you ignition system.
If you have changed the ECU or the IGN key switch they need to be fitted in matched pairs as the key switch is match coded to the ECU
Unless you purchase a brand new one that will be blank but must be coded by the dealer or someone with the correct software.
Inside the key is a small chip that tells the ECU it is a match & lets the car start.
The mechanics of most key switchs can be replaced but you must put the chip from your old key into the newly fitted key.
Some cars like Mercedes have the key switch coded & the key so they talk to each other & they must also be coded to the ECU as well.
Nothings ever simple is it.
Posted on Dec 02, 2008
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Posted on Jan 02, 2017
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