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Home >> Jeep >> 2012 >> Compass Limited, FWD, Standard >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Transmission Control Module (TCM) - Electrical Diagnostics >> DTC Troubleshooting >> P0843-Primary Oil Pressure Sensor Circuit High >> Theory Of Operation
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Theory Of Operation

The Transmission Control Module (TCM) monitors the input voltage from the primary pulley pressure sensor. When the voltage is above a predetermined limit a DTC will set.