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Engine-Codes – Scion – B158F Scion

B158F Scion Code - AV Signal Stoppage Low Battery Voltage

Quick Answer

The B158F diagnostic trouble code (DTC) for Scion vehicles indicates an "AV Signal Stoppage Low Battery Voltage" issue. Common causes include Weak or failing battery, Loose or corroded battery connections, Faulty alternator. 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 Scion indicates AV Signal Stoppage Low Battery Voltage.
Common causes
Common causes include Weak or failing battery, Loose or corroded battery connections, Faulty alternator.
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 11, 2024
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Code B158F Scion Description

The B158F diagnostic trouble code (DTC) for Scion vehicles indicates an "AV Signal Stoppage Low Battery Voltage" issue. This code is related to the audio and visual (AV) system in the vehicle, which includes components such as the radio, navigation system, and entertainment features. When this code is triggered, it means that there is a problem with the AV signal due to low battery voltage.

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

Common Causes of B158F Scion

  1. Weak or failing battery
  2. Loose or corroded battery connections
  3. Faulty alternator
  4. Defective AV system components
  5. Electrical system issues

Symptoms of B158F Scion

  1. Audio system cutting in and out
  2. Screen flickering or freezing
  3. Navigation system errors
  4. AV system not turning on
  5. Dimming of interior lights when AV system is in use

How to Fix B158F Scion

  1. Start by checking the battery voltage using a multimeter to ensure it is within the manufacturer's recommended range.
  2. Inspect the battery terminals for any corrosion or looseness and clean/tighten them if necessary.
  3. Test the alternator to ensure it is charging the battery properly.
  4. Check the AV system components for any visible damage or malfunctions and replace as needed.
  5. Reset the AV system by disconnecting the battery for a few minutes and then reconnecting it to see if the issue is resolved.

Cost to Fix B158F Scion

The cost of repairing a B158F code related to low battery voltage in a Scion can vary depending on the specific cause of the issue. On average, the repair costs for this type of problem could range from $100 to $500, including parts and labor. Keep in mind that labor rates at auto repair shops can vary, so it's advisable to check with local shops for a more accurate estimate. Additionally, if the battery or alternator needs to be replaced, the costs could be higher.

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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 Scion Code

1. What does the OBDII code B158F mean for a Scion?

The code B158F indicates "AV Signal Stoppage Low Battery Voltage," meaning the audio-visual system is experiencing low voltage, potentially disrupting its operation.

2. What are the common symptoms of code B158F in a Scion?

Symptoms may include a non-functional or glitchy infotainment system, loss of audio or visual output, and occasional system restarts.

3. What causes the B158F code to appear?

The primary causes are a weak or failing vehicle battery, poor electrical connections, or a fault in the AV system wiring or components.

4. Can a low vehicle battery trigger the B158F code?

Yes, a low or failing vehicle battery is a common cause of this code, as insufficient voltage can disrupt the AV system's operation.

5. How can I fix the B158F code on my Scion?

Start by checking the battery's voltage and condition, inspecting wiring and connectors for damage or corrosion, and ensuring the AV system’s power supply is stable.

6. Is the B158F code serious?

While it doesn’t typically affect vehicle drivability, it can interfere with the functionality of the infotainment system and may indicate underlying electrical issues.

7. Can I clear the B158F code without repairs?

You can clear the code using an OBDII scanner, but if the underlying issue isn’t resolved, the code will likely return.

8. How do I test for low voltage in the AV system?

Use a multimeter to measure the voltage at the battery and the AV system’s power input. A reading below the required range indicates an issue.

9. Could a blown fuse cause the B158F code?

Yes, a blown fuse in the AV system circuit could result in a power disruption, triggering the code.

10. When should I consult a professional for the B158F code?

If you’ve checked the battery, wiring, and fuses and the code persists, it’s best to consult a professional for advanced diagnostics on the AV system.

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