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P20E8 -deramax

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I got a 2013 Chevrolet Silverado 2wd duramax 6.6L, It has a code of P20E8 ( reduotant pressure too low) all the time and every now and then a code of P204F comes up and gives me so many miles tell reduced speed.

Vehicle: 2013 Chevrolet Silverado 2wd duramax 6.6L

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