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Home >> Dodge and Ram >> 2012 >> Caliber SXT Plus, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 3 ((Transmission Control Module (TCM) - Electrical Diagnostics)) >> DTC Troubleshooting >> P1661-Sensor Ground Reference Circuit >> Theory Of Operation
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Theory Of Operation

WARNING: This page is about a different variant/trim than selected.

The Oil Temperature Sensor, Primary and Secondary Oil Pressure Sensor and the Input Speed Sensor use a common ground circuit that returns to the Transmission Control Module (TCM). If all of these circuits show an open (high voltage) the DTC will set.