B1025 2014 GMC Sierra Code - Left Front Door Audio Output 1 Circuit
Quick Answer
Vehicles without Amplifier: Each of the audio output channel circuits (+) and (-), at the radio have a DC bias voltage that is approximately one-half of battery voltage. Common causes include Faulty Radio Unit, Faulty Audio Amplifier (If equipped), Faulty Left Front Door Speaker. 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
- B1025 2014 GMC Sierra indicates Left Front Door Audio Output 1 Circuit.
- Common causes
- Common causes include Faulty Radio Unit, Faulty Audio Amplifier (If equipped), Faulty Left Front Door Speaker.
- 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 B1025 2014 GMC Sierra Description
Each of the audio output channel circuits (+) and (-), at the radio have a DC bias voltage that is approximately one-half of battery voltage. When using a DMM, each of the audio output channel circuits will measure approximately 6.5 V DC. The audio being played on the system is produced by a varying AC voltage that is centered around the DC bias voltage on the same circuit. The AC voltage is what causes the speaker cone to move and produce sound. The frequency (Hz) of the AC voltage signal is directly related to the frequency of the input (audio source playing) to the audio system. Both the DC bias voltage and the AC voltage signals are needed for the audio system to properly produce sound.
Vehicles with Amplifier:
The Media Oriented Systems Transport (MOST) is a high-speed multimedia network technology. The serial MOST bus uses a ring topology and synchronous data communication to transmit audio, video, data and control information between any devices attached.
The audio amplifier is a participant on the MOST network. The audio amplifier receives audio input and control information from the MOST bus.
Each of the audio output channel circuits (+) and (−), at the audio amplifier have a DC bias voltage that is approximately one-half of the battery voltage. When using a DMM, each of the audio output channel circuits will measure approximately 6.5V DC. The audio being played on the system is produced by a varying AC voltage that is centered around the DC bias voltage on the same circuit. The AC voltage is what causes the speaker cone to move and produce sound.
What are the Possible Causes of the DTC B1025 2014 GMC Sierra?
- Faulty Radio Unit
- Faulty Audio Amplifier (If equipped)
- Faulty Left Front Door Speaker
- Left Front Door Speaker harness is open or shorted
- Left Front Door Speaker circuit poor electrical connection
How to Fix the DTC B1025 2014 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
B1025:02 Left Front Door Audio Output 1 Circuit Short to Ground
B1025:04 Left Front Door Audio Output 1 Circuit Open
User Submitted Video
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B1025 2014 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.
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Frequently Asked Questions about B1025 2014 GMC Sierra Code
1. What does the OBDII code B1025 indicate on a 2014 GMC Sierra?
Code B1025 refers to an issue with the Left Front Door Audio Output 1 Circuit, typically related to the speaker or wiring.
2. What are common symptoms of the B1025 code in a 2014 GMC Sierra?
Symptoms may include no sound or distorted audio from the left front door speaker.
3. What causes the B1025 code on a 2014 GMC Sierra?
Common causes include a faulty left front door speaker, damaged wiring, a poor connection, or a malfunctioning amplifier.
4. Can a blown speaker trigger the B1025 code?
Yes, a blown or faulty left front door speaker can cause the B1025 code to appear.
5. How can I diagnose the B1025 code on my GMC Sierra?
Inspect the left front door speaker, wiring, and connectors for damage or loose connections. Use a multimeter to test continuity and resistance.
6. Can the B1025 code be caused by an issue with the amplifier?
Yes, if the amplifier is not sending a proper signal to the left front speaker, it could trigger this code.
7. How do I fix the B1025 code on my 2014 GMC Sierra?
Repairs may involve replacing the left front door speaker, repairing damaged wiring, or replacing the amplifier if it is faulty.
8. Will clearing the B1025 code fix the issue?
Clearing the code without addressing the underlying issue will not fix the problem; the code will likely reappear.
9. Can moisture in the door panel cause the B1025 code?
Yes, moisture can damage the speaker or corrode wiring, potentially triggering this code.
10. Do I need professional help to resolve the B1025 code?
While you can inspect and test components yourself, professional diagnostics may be required if the issue involves the amplifier or deeper electrical problems.
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