Device Voltage Circuit
Table of contents
B1420 GMC Possible Causes
- Faulty Body Control Module (BCM)
- Body Control Module harness is open or shorted
- Body Control Module circuit poor electrical connection
How do I fix code B1420 GMC?
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 B1420 GMC code
The cost of diagnosing the B1420 GMC 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)
B1420 GMC Description
The Body Control Module (BCM) monitors the battery voltage on the battery voltage signal circuit. Damage to components and incorrect data may occur when the voltage is out of range.