Chevrolet Repair Questions? Ask a Mechanic for Answers ASAP
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The transfer case encoder is an analog sensor that returns a signal that represents the physical position of the transfer case sector shaft. This signal represents the mode or position that the transfer case is currently in. This sensor is made up of the following 3 circuits:
This DTC detects an out of range reading from the encoder signal, a short to voltage on the 5-volt reference circuit.
You can not test the encoder signal with out a scan tool to see if its out o f range.
You will want to check wires to trans case and transfer case connections and to encoder sensor. Its common that the encoder sensor is bad but could betrans case shift control module. This if wires and connections are good but with out a scanner to do most of the testing it will be hard. You will want to get one.
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