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Engine-Codes – Generic – B158F

B158F Code - AV Signal Stoppage Low Battery Voltage

Quick Answer

The B158F diagnostic trouble code (DTC) indicates an AV (audio/video) signal stoppage due to low battery voltage. Common causes include Weak or failing battery unable to maintain proper voltage levels, Faulty alternator not charging the battery adequately, Loose or corroded electrical connections affecting power supply to the AV system. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means
B158F indicates AV Signal Stoppage Low Battery Voltage.
Common causes
Common causes include Weak or failing battery unable to maintain proper voltage levels, Faulty alternator not charging the battery adequately, Loose or corroded electrical connections affecting power supply to the AV system.
Severity
High - diagnose this code as soon as possible.
Can I drive?
Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
What is this?
Table of contents Created and updated by William Orellana on Sep 08, 2024
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Code B158F Description

The B158F diagnostic trouble code (DTC) indicates an AV (audio/video) signal stoppage due to low battery voltage. This code typically occurs when the battery voltage drops below the threshold required to power the AV system in the vehicle. The AV system includes components such as the infotainment system, navigation system, rear-seat entertainment system, and other audio/video features. When the battery voltage is insufficient, these systems may not function properly or could shut down altogether.

OBDII Code B158F - AV Signal Stoppage Low Battery Voltage
B158F Code - AV Signal Stoppage Low Battery Voltage

Common Causes of B158F

  1. Weak or failing battery unable to maintain proper voltage levels.
  2. Faulty alternator not charging the battery adequately.
  3. Loose or corroded electrical connections affecting power supply to the AV system.
  4. Excessive power draw from the AV system components, draining the battery.
  5. Electrical system malfunction affecting the AV system's operation.

Symptoms of B158F

  1. Intermittent loss of audio or video playback on the infotainment system.
  2. Error messages related to the AV system displayed on the screen.
  3. Navigation system errors or inaccurate GPS positioning.
  4. Rear-seat entertainment system not functioning properly.
  5. Complete shutdown of the AV system.

How to Fix B158F

  1. Begin by checking the battery voltage using a multimeter to ensure it meets the manufacturer's specifications.
  2. Test the alternator output to verify it is charging the battery correctly.
  3. Inspect and clean all electrical connections related to the AV system to ensure a stable power supply.
  4. Replace the battery if it is weak or failing to hold a charge.
  5. If necessary, repair or replace any faulty components in the AV system that may be causing excessive power draw.

Cost to Fix B158F

The typical repair costs for addressing a B158F code related to low battery voltage can range from $100 to $500, depending on the specific cause of the issue and the parts or components that require replacement. Labor costs can vary between $80 and $150 per hour, with additional diagnostic time possibly required. It is recommended to consult with a professional mechanic or auto repair shop for a more accurate estimate based on the vehicle's make and model, as well as the severity of the issue.

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Code B158F Information for Specific Makes

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B158F Code

What does OBDII code B158F mean?

1. Code B158F indicates "AV Signal Stoppage Low Battery Voltage," which points to an issue where the audio-visual (AV) system is experiencing interruptions due to low voltage in the system. 2.

What are the common symptoms of code B158F?

Symptoms include intermittent or no audio-visual system functionality, static or distorted sound, and possible display errors on the infotainment screen. 3.

What causes code B158F to appear?

The most common causes include a weak or discharged vehicle battery, poor electrical connections, failing alternator, or a fault in the AV system wiring or components. 4.

Can a low car battery trigger code B158F?

Yes, a low or failing car battery can cause this code because the AV system requires stable voltage to operate properly. 5.

How do I fix code B158F?

Start by checking the battery voltage and connections. Replace or recharge the battery if necessary, inspect the alternator’s charging performance, and check for loose or damaged wiring in the AV system. 6.

Can a failing alternator cause code B158F?

Yes, a failing alternator can result in insufficient voltage supply, which may cause AV signal stoppage and trigger this code. 7.

Is it safe to drive with code B158F present?

While it may not immediately affect drivability, ignoring the issue can lead to further electrical problems or the AV system becoming inoperable. 8.

How do I check for wiring issues related to code B158F?

Inspect the AV system's wiring for frayed, corroded, or loose connections. Use a multimeter to test for continuity and ensure proper voltage delivery. 9.

Do I need a professional to fix code B158F?

If you’re experienced with diagnosing electrical systems, you can attempt basic checks and repairs. Otherwise, it’s best to consult a professional technician for a thorough diagnosis. 10.

Can code B158F be caused by a software issue?

In some cases, outdated or corrupted AV system software can contribute to this error. Performing a system update may resolve the issue.

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