Engine-Codes - Dodge - P1684 DODGE

P1684 DODGE - Battery Power To Module Disconnected

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents

P1684 DODGE Possible Causes

  • Battery was recently disconnected
  • Low battery voltage
  • Malfunctioning charging system
  • Transmission Control Module (TCM) was replaced or disconnected
  • Faulty Transmission Control Module (TCM)
  • Transmission Control Module (TCM) harness is open or shorted
  • Transmission Control Module (TCM) circuit poor electrical connection

How is the P1684 DODGE code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

Tech Notes

If other codes are present, check and repair other codes first. Make sure the battery charge is OK and the battery connectors are firmly secure.

What is the cost to diagnose the P1684 DODGE code

Labor: 1.0

The cost to diagnose the P1684 DODGE code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.
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Possible Symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1684 DODGE Meaning

The Diagnostic Trouble Code (DTC) P1684 will set when the Transmission Control Module (TCM) is disconnected from battery voltage or ground. The DTC will also set during DRB-III QUICK BATTERY DISCONNECT procedure. The DTC data will be lost. The vehicle will go into immediate limp-in mode if power is lost while operating the vehicle. Normal operation is resumed if the power is restored during the same key start.

More Information

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