Battery Power To Module Disconnected
Table of contents
P1684 JEEP 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 do I fix code P1684 JEEP?
Check 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.
Cost of diagnosing the P1684 JEEP code
The cost of diagnosing the P1684 JEEP code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P1684 JEEP Description
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.