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P1825 Diagnostic Trouble Code Discussion for August 2006

Internal Mode Switch - Invalid Range

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Trouble Ticket Help Requests for DTC P1825
Help Request Posted
2000 Chevrolet Impala 3.4L No Start VIN: 2G1WF55K8Y
P1825: Internal Mode Switch - Invalid Range. This car originally came in with a vent valve code. Traced out wiring and found broken wire where harness loops under A/C accumulator. After repairing wire, found that car would not crank over. Tested circuits and found PCM was not grounding starter relay. Man...
August 21, 2006