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Discussion Starter #1
Check engine light came on today. Ran the code and it came up with P0604.

"Definition- Control Module Random Access Memory (RAM) fault

Explanation -ECM detected the internal data test failed (RAM)

Probably Cause- Failed ECM"

Anyone have any idea what that could be? My car only has 27k miles on it. Id appreciate any advice in case its something I dont need to pay the shop to do.
 

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If it's a failed ECM then you're going to need the dealer. You're going to need a new ECM and a Tech II to connect it up to the other modules. You could try disconnecting the battery for 15 minutes and rehook it up. Maybe it is a one time glitch.
 

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Former Moderator
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It sounds like the Cardon unit is a reman but I wouldn't be afraid of that at all. Electronics that have been cycled can be better than new untested ones. It has a warranty and if it lives through that it will probably outlive the car.
 
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