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P0737moderate severityPowertrain

TCM Engine Speed Output Circuit

on 1999 Dodge Dakota 3.9L V6 Magnum · 4WD

What this code means

There is a fault in the engine speed output circuit from the transmission control module. This circuit relays RPM information used for control functions.

Symptoms

  • Erratic shifting
  • Check engine light on
  • Possible RPM-related driveability issues

Common causes

  • Wiring fault in output circuit
  • Corroded or loose connector
  • Faulty TCM
  • Related sensor fault

Diagnostic steps

  1. Scan codes and freeze frame
  2. Inspect output circuit wiring and connectors
  3. Test circuit continuity and voltage
  4. Replace TCM if circuit checks good

Other Powertrain codes on this vehicle

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