Backup Battery Circuit Voltage Below Threshold
Table of contents
B1E21 JEEP Possible Causes
- Faulty Backup Battery
- Backup Battery harness is open or shorted
- Backup Battery circuit poor electrical connection
- Faulty Emergency Assistance Module (EAM)
How do I fix code B1E21 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.
Cost of diagnosing the B1E21 JEEP code
The cost of diagnosing the B1E21 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)
B1E21 JEEP Description
The Emergency Assistance Module (EAM) monitors the Backup Battery Circuit. The EAM sets the OBDII code when it detects a low backup battery.