PC1520 and IR1740 1996 Cadillac northstar v8 4.6l concours?

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D

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1996 cadillac concours northstar v8 4.6l

was just wondering what some ideas were to resolve this problem side effects my car will say it is in N when really it is in D but it runs fine i just want to correct this problem and one time the blower motor just cut out and stopped working then i started it up after work and it worked fine since.

PC1520 = Park/Neutral or PRNDL input problem
also i get a error IR1740 = IRC configuration error

both are current code errors
 
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