Troubleshooting Error Code 4 of Curt RVI Series 4 Supplemental Braking System
Updated 02/04/2026 | Published 01/26/2026
Question:
New RVI 4 gives error code 4 when trying to set up for the first time
asked by: Walter K
0
Expert Reply:
Hey Walter, I checked with Curt and the RVI Series 4 part # RVI44FR that you referenced showing a Code 4 is related to exposure to cold weather and it's causing some circuit board issues. The solution is to let it sit indoors to warm up for 15 to 20 minutes and it will work again. With as cold as it's been here I believe this to be what's going on! Try that and let me know if you still have issues.
expert reply by:
Jameson C
0
Product Page this Question was Asked From
Curt RVi Series 4 Portable Flat Tow Brake System - Wireless Monitor - Proportional
- Flat Tow Brake System
- Brake Systems
- Proportional System
- Every-Trip Setup
- 12V Outlet
- Portable System
- Air Brakes
- Air Over Hydraulic Brakes
- Hydraulic Brakes
- Wireless Display
- CURT
more information >
Featured Help Information
Instructions
Continue Researching
- Video: A Closer Look at the Curt RVi Series 4 Portable Flat Tow Brake System
- Video: Review of CURT Flat Tow Brake System - Brake Systems - RVI44FR
- Shop: Curt RVI Series Breakaway Wireless Adapter for RVibrake 3 and RVibrake 4
- Shop: Curt RVi Series 4 Portable Flat Tow Brake System - Wireless Monitor - Proportional
- Video: Review of CURT Replacement Command Center Hub RVi Series 4 Portable Flat Tow Braking System - C77NQ
- Shop: Trailer Hitch
- Video: Curt RVi Series 4 Portable Flat Tow Brake System Install - 2018 Jeep JK Wrangler Unlimited
- Shop: Replacement Command Center Hub for Curt RVi Series 4 Portable Flat Tow Braking System
- Video: Installing the Curt RVi Series 4 Portable Flat Tow Brake System on a 2025 Ford Maverick
- Q&A: Parts Needed to Flat Tow 2024 Chevrolet Silverado 1500 Trail Boss
- Shop: Vehicle Tow Bar Brake System
- Shop: Trailer Wiring
- Q&A: How To Adjust Braking Sensitivity Of Curt RVi Series 4 Flat Tow Portable Brake System That Grabs
- Shop: Curt RVi Series Towed Battery Charger+ for Flat Towing
- Shop: Champion Dual Fuel Inverter Generators w/ Parallel Kit - 7,000 Running Watts - Electric Start
- Search Results: 14211
- Search Results: battery
- Search Results: 52023
- Search Results: winch strap
- Search Results: 2" strap
- Search Results: axle nuts
- Search Results: drop ~ 4 inch trailer hitch ball mount
- Shop: Base Plate for Tow Bar
- Video: Review of Champion Generators - Twin 4500 Watt Duel Fuel Inverter Generator Parallel Kit - CH49FR
- Shop: Curt T-Connector Vehicle Wiring Harness for Factory Tow Package - 7-Way Trailer Connector
- Shop: Blue Ox Avail Non-Binding Tow Bar - RV Mount - 2" Hitch - 10,000 lbs
- Video: Ultimate Overview of the Brake Buddy Classic 3 Portable Flat Tow Brake System
- Shop: Vehicle Tow Bar Wiring
- Shop: Brake Controller
- Shop: Gooseneck Hitch
Explore Expert Info
on Flat Tow Brake System
on Flat Tow Brake System
Walter K.
1/29/2026
Located in Arizona, night temps 40 degrees, day temps 70 degrees. Bringing the unit inside did not resolve the error. Talked to Collin @ Curt product support 1/27/26. Troubleshoot & no resolution. Gave me a case #6520556? Now waiting for something to happen, I guess. I Emailed Curt product support on 1/28/26 to receive updated status information and still waiting for a response.