B125A:04 Code - Antenna Signal Circuit Open
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:04 indicates Antenna Signal Circuit Open.
- 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:04 Description
What are the Possible Causes of the DTC B125A:04?
- Faulty Radio Unit
- Faulty Coax Cable
- Faulty Cellular Phone, Navigation, and Digital Radio Antenna
How to Fix the DTC B125A:04?
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:04 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.
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Frequently Asked Questions about B125A:04 Code
1. What does the OBDII code B125A:04 mean?
The code B125A:04 indicates an "Antenna Signal Circuit Open," meaning there is a break or disconnection in the antenna signal circuit.
2. What are the common symptoms of the B125A:04 code?
Symptoms may include poor or no radio reception, static or interference in the audio system, or the inability to tune into certain frequencies.
3. What causes the B125A:04 code to appear?
Possible causes include a damaged or disconnected antenna, a broken antenna cable, corrosion in the antenna connector, or a faulty radio module.
4. How can I diagnose the B125A:04 code?
Start by inspecting the antenna and its wiring for visible damage or disconnections. Use a multimeter to check for continuity in the antenna signal circuit.
5. Can a loose antenna cause the B125A:04 code?
Yes, a loose or improperly installed antenna can disrupt the signal and trigger this code.
6. Is the B125A:04 code serious?
While it doesn’t affect the vehicle’s drivability, it can impact the functionality of the radio and audio systems, which may be inconvenient.
7. How do I fix the B125A:04 code?
Repairs may involve reconnecting or replacing the antenna, repairing damaged wiring, cleaning corroded connectors, or replacing a faulty radio module.
8. Could a software issue trigger the B125A:04 code?
In rare cases, a software issue in the vehicle’s infotainment system could lead to this code. Updating the software may resolve the problem.
9. Can I drive my car with the B125A:04 code present?
Yes, the vehicle is safe to drive, but you may experience issues with radio or audio functionality until the problem is fixed.
10. How much does it cost to repair the B125A:04 code?
Repair costs can range from $50 to $300 or more, depending on whether the issue is a simple wiring repair or a replacement of components like the antenna or radio module.
Discuss the causes and fixes for B125A:04 OBDII Code
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