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Rx300 p1663

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Old Mar 29, 2018 | 07:31 PM
  #1  
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jangoak47
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Default Rx300 p1663

I have searched on google for an answer and have been unable to find one.
So far I have replaced both Bank sensors, but I am still getting a code p1663.
After searching I noticed this was an electrical only issue.

Can someone give me a quick run down on how I would check if its either the wires or the ECM that is bad?
I have a multimeter, but I am unsure on how to check for bad wiring on either the connector or the ECM?
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Old Mar 29, 2018 | 07:37 PM
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Did you use OEM sensors or aftermarket?

Salim
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Old Mar 29, 2018 | 07:43 PM
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jangoak47
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Thanks for the quick reply.
I used the following from Amazon.
Dorman PN: 917 211
Amazon Amazon
Dorman PN: 917 214
Amazon Amazon
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