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Engine-Codes – Generic – B1517:5A

B1517:5A Code - Battery Voltage Not Plausible

Quick Answer

The B1517:5A diagnostic trouble code (DTC) indicates that the battery voltage in the vehicle's electrical system is not within the expected range. Common causes include Faulty battery, Damaged wiring or connectors, Malfunctioning 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
B1517:5A indicates Battery Voltage Not Plausible.
Common causes
Common causes include Faulty battery, Damaged wiring or connectors, Malfunctioning 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 08, 2024
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Code B1517:5A Description

The B1517:5A diagnostic trouble code (DTC) indicates that the battery voltage in the vehicle's electrical system is not within the expected range. This means that the voltage readings from the battery are either too high or too low, which can lead to various issues within the vehicle's electrical and electronic systems.

OBDII Code B1517:5A - Battery Voltage Not Plausible
B1517:5A Code - Battery Voltage Not Plausible

Common Causes of B1517:5A

  1. Faulty battery
  2. Damaged wiring or connectors
  3. Malfunctioning alternator
  4. Issues with the voltage regulator
  5. Electrical system shorts or faults

Symptoms of B1517:5A

  1. Difficulty starting the vehicle
  2. Dimming or flickering lights
  3. Erratic behavior from electronic systems (e.g., radio, power windows)
  4. Warning lights on the dashboard (e.g., battery light, check engine light)
  5. Complete electrical system failure

How to Fix B1517:5A

  1. Begin by testing the battery to ensure it is holding a charge and functioning properly.
  2. Check the wiring and connectors for any damage or corrosion, repairing or replacing as necessary.
  3. Test the alternator and voltage regulator to ensure they are functioning correctly.
  4. Clear the DTC and reset the system to see if the issue persists.
  5. If the problem persists, consult a professional mechanic for further diagnosis and repair.

Cost to Fix B1517:5A

The cost of repairing a battery voltage not plausible issue can vary depending on the specific cause of the problem. In general, replacing a faulty battery can cost anywhere from $100 to $200, while repairing wiring or connectors may range from $50 to $150. If the alternator or voltage regulator needs to be replaced, costs can range from $200 to $500 or more. Labor costs can vary, but typically range between $80 and $150 per hour. It is recommended to consult a local mechanic or repair shop for a more accurate estimate based on your vehicle's make and model.

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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 B1517:5A Code

What does OBDII code B1517:5A mean?

Code B1517:5A indicates that the vehicle's control module has detected an issue with the plausibility of the battery voltage signal, meaning the reported voltage is outside the expected range or inconsistent.

What are the common symptoms of code B1517:5A?

Common symptoms include warning lights such as the battery or check engine light, electrical system malfunctions, difficulty starting the vehicle, or dimming lights.

What causes the B1517:5A code to appear?

Possible causes include a failing battery, loose or corroded battery terminals, a faulty alternator, wiring issues, or a malfunctioning control module.

Can a weak battery trigger the B1517:5A code?

Yes, a weak or dying battery can cause voltage irregularities, leading to this code.

How do I diagnose the B1517:5A code?

Start by checking the battery voltage and condition, inspect the battery terminals and connections for corrosion or looseness, and test the alternator output. Use a scan tool to verify live data for voltage readings.

Can the alternator cause the B1517:5A code?

Yes, a faulty alternator may provide inconsistent or low voltage, triggering this code.

Is it safe to drive with the B1517:5A code?

Driving with this code is not recommended, as it may indicate electrical system issues that could lead to breakdowns or further damage.

How can I fix the B1517:5A code?

Repairs may include cleaning or tightening battery terminals, replacing the battery, repairing damaged wiring, or replacing a faulty alternator or control module.

Can a software update resolve the B1517:5A code?

In some cases, a software update for the vehicle’s control module may address voltage reading inconsistencies, but this depends on the make and model of the vehicle.

Do I need professional help to fix the B1517:5A code?

If basic checks like cleaning connections or replacing the battery don’t resolve the issue, it’s best to consult a professional to diagnose and repair more complex electrical problems.

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