Rearview Camera Supply Circuit
Table of contents
B399B GMC Possible Causes
- Faulty Rearview Camera
- Rearview Camera harness is open or shorted
- Rearview Camera circuit poor electrical connection
- Faulty Video Processing Control Module
How do I fix code B399B 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.
Tech Notes
- B399B 01 Rearview Camera Supply Circuit Short to Battery
- B399B 02 Rearview Camera Supply Circuit Short to Ground
Cost of diagnosing the B399B GMC code
The cost of diagnosing the B399B 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)
B399B GMC Description
The Video Processing Control Module performs fault detection on itself and the cameras attached to it. The Diagnostic Trouble Code (DTC) sets when the Rearview camera 6V reference circuit is shorted to voltage or is shorted to ground.