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Home >> Dodge and Ram >> 2009 >> Challenger SE, 42RLE/VLP >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Powertrain Control Module (Pcm) - Electrical Diagnostics - 42RLE >> DTC Troubleshooting >> P0721-Output Speed Sensor Circuit Performance >> Theory Of Operation

Theory Of Operation

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.