B125A 2017 GMC Sierra Code - Antenna Signal Circuit
Quick Answer
The digital radio receiver, located inside the radio, receives digital radio information from the digital radio antenna located on the outside of the vehicle. Common causes include Faulty Radio Unit, Faulty Coax Cable, Faulty Cellular Phone, Navigation, and Digital Radio Antenna. Severity is Low - monitor the vehicle and repair when practical. The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
- What it means
- B125A 2017 GMC Sierra indicates Antenna Signal Circuit.
- Common causes
- Common causes include Faulty Radio Unit, Faulty Coax Cable, Faulty Cellular Phone, Navigation, and Digital Radio Antenna.
- Severity
- Low - monitor the vehicle and repair when practical.
- Can I drive?
- The vehicle can usually be driven if no severe symptoms are present, but symptoms should be checked before extended driving.
Code B125A 2017 GMC Sierra Description
What are the Possible Causes of the DTC B125A 2017 GMC Sierra?
- Faulty Radio Unit
- Faulty Coax Cable
- Faulty Cellular Phone, Navigation, and Digital Radio Antenna
How to Fix the DTC B125A 2017 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
B125A:02 Antenna Signal Circuit Short to Ground
B125A:04 Antenna Signal Circuit Open
Poor AM and FM radio reception may be due to multiple influences, some of which may not be vehicle related. Areas that have high RF traffic or block the signal path may cause a degradation in radio reception. Radio reception may also be influenced by items within the vehicle, but not part of the radio system. Such examples are aftermarket electrical accessories or other items which may generate noise in the vehicle's electrical system. Aftermarket window tinting, especially when there is metallic in the film, may reduce radio reception.
AM reception is highly dependent on the antenna amplifier receiving battery voltage from the radio and being properly grounded. The antenna base has a built-in antenna amplifier that boosts both AM and FM reception. When the antenna amplifier does not receive power, AM stations may not be received, and FM reception will be limited. If the antenna base is not properly grounded, excessive interference in the signal may occur or reception may be limited.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B125A 2017 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
Need more information about the B125A 2017 GMC Sierra code?
Need more information on how to fix the B125A 2017 GMC Sierra code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the B125A 2017 GMC Sierra code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about B125A 2017 GMC Sierra Code
1. What does the OBDII code B125A mean on a 2017 GMC Sierra?
The B125A code indicates an issue with the antenna signal circuit, typically related to the vehicle's radio or infotainment system.
2. What are the common symptoms of code B125A in a 2017 GMC Sierra?
Symptoms may include poor radio reception, static, or the inability to tune into certain stations.
3. What causes the B125A code to appear on a GMC Sierra?
The code can be caused by a damaged antenna, a loose or corroded antenna connection, a faulty antenna module, or wiring issues in the antenna circuit.
4. How do I diagnose the B125A code on my 2017 GMC Sierra?
Start by inspecting the antenna and its connections for damage or corrosion. Then check the wiring and connectors in the antenna signal circuit for continuity and proper grounding.
5. Can a software update fix the B125A code on a GMC Sierra?
In rare cases, a software update for the infotainment system might resolve the issue, but typically the problem is hardware-related.
6. Is it safe to drive with the B125A code active on a 2017 GMC Sierra?
Yes, it is safe to drive, but your radio or infotainment system may not function properly until the issue is resolved.
7. How much does it cost to repair the B125A code on a GMC Sierra?
Repair costs vary but can range from $50 for a simple connection fix to $300 or more if the antenna or module needs replacement.
8. Can I fix the B125A code on my GMC Sierra myself?
If you're comfortable with basic electrical troubleshooting, you can inspect and repair loose connections or replace a damaged antenna. More complex issues may require professional assistance.
9. Does a failing antenna always trigger the B125A code on a GMC Sierra?
No, the code can also be triggered by wiring issues, a bad antenna module, or a problem with the infotainment system.
10. How do I clear the B125A code after making repairs?
Use an OBDII scanner to clear the code. If the issue is resolved, the code should not return. If it does, further diagnostics may be needed.
Discuss the causes and fixes for B125A 2017 GMC Sierra OBDII Code
Code B125A 2017 GMC Sierra comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
