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Home >> Dodge and Ram >> 2009 >> Durango Base, 4.7 P, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Powertrain Control Module (Pcm) - Electrical Diagnostics - 42RLE) >> DTC Troubleshooting >> P0721-Output Speed Sensor Circuit Performance >> Theory Of Operation
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Theory Of Operation

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

The transmission system uses two speed sensors, one to measure input RPM and one to measure output RPM. These inputs are essential for proper transmission operation. Therefore, the integrity of this data is verified through system checks.