AutoCodes – Buick – B1420 Buick

B1420 Buick Code - Device Voltage Circuit

Quick Answer

The Body Control Module (BCM) monitors the battery voltage on the battery voltage signal circuit. Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module circuit poor electrical connection. 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
B1420 Buick indicates Device Voltage Circuit.
Common causes
Common causes include Faulty Body Control Module (BCM), Body Control Module harness is open or shorted, Body Control Module circuit poor electrical connection.
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.
AI answers can be wrong. Verify repairs with testing. Open full chat
Code Popularity 1,067
How popular is this code, among other codes? Low
Table of contents Created and updated by William Orellana on Apr 09, 2019
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Code B1420 Buick Description

The Body Control Module (BCM) monitors the battery voltage on the battery voltage signal circuit. Damage to components and incorrect data may occur when the voltage is out of range.
OBDII Code B1420 Buick - Device Voltage Circuit - AutoCodes.com
B1420 Buick Code - Device Voltage Circuit

What are the Possible Causes of the DTC B1420 Buick?

  • Faulty Body Control Module (BCM)
  • Body Control Module harness is open or shorted
  • Body Control Module circuit poor electrical connection

How to Fix the DTC B1420 Buick?

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.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1420 Buick 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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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 B1420 Buick Code

1. What are the common symptoms of OBDII code B1420 (Buick) Device Voltage Circuit?

The common symptoms of OBDII code B1420 (Buick) Device Voltage Circuit include issues with the vehicle's electronic components, such as malfunctioning sensors or erratic readings on the dashboard.

2. What are the possible causes of OBDII code B1420 (Buick) Device Voltage Circuit?

Possible causes of OBDII code B1420 (Buick) Device Voltage Circuit include a faulty voltage regulator, damaged wiring in the circuit, or a malfunctioning electronic control unit (ECU).

3. How can I diagnose OBDII code B1420 (Buick) Device Voltage Circuit?

Diagnosing OBDII code B1420 (Buick) Device Voltage Circuit involves using a diagnostic scanner to retrieve the trouble codes, checking the voltage levels in the circuit, and inspecting the wiring and connections for any signs of damage.

4. What are some repair tips for fixing OBDII code B1420 (Buick) Device Voltage Circuit?

Repair tips for fixing OBDII code B1420 (Buick) Device Voltage Circuit include repairing or replacing damaged wiring, checking and replacing the voltage regulator if necessary, and ensuring proper connections in the circuit.

5. Can OBDII code B1420 (Buick) Device Voltage Circuit be fixed at home, or should I take it to a professional mechanic?

While some simple repairs for OBDII code B1420 (Buick) Device Voltage Circuit can be done at home, it is recommended to consult a professional mechanic for a thorough diagnosis and repair, especially if you are not familiar with automotive electrical systems.

6. Does OBDII code B1420 (Buick) Device Voltage Circuit affect the vehicle's performance?

OBDII code B1420 (Buick) Device Voltage Circuit can potentially affect the vehicle's performance by causing issues with electronic components, leading to erratic behavior or malfunctions in various systems.

7. Are there any preventive measures to avoid OBDII code B1420 (Buick) Device Voltage Circuit?

To avoid OBDII code B1420 (Buick) Device Voltage Circuit, it is recommended to regularly inspect the vehicle's electrical components, keep up with scheduled maintenance, and address any electrical issues promptly to prevent further damage.

8. How long does it typically take to repair OBDII code B1420 (Buick) Device Voltage Circuit?

The time it takes to repair OBDII code B1420 (Buick) Device Voltage Circuit can vary depending on the extent of the damage and the specific repair needed. It can range from a few hours to a day, depending on the complexity of the issue.

9. Can driving with OBDII code B1420 (Buick) Device Voltage Circuit cause further damage to the vehicle?

Continuing to drive with OBDII code B1420 (Buick) Device Voltage Circuit can potentially cause further damage to the vehicle's electronic components, leading to more extensive repairs and potentially compromising the vehicle's safety and performance.

10. Is it safe to ignore OBDII code B1420 (Buick) Device Voltage Circuit if the vehicle seems to be running fine?

Ignoring OBDII code B1420 (Buick) Device Voltage Circuit, even if the vehicle seems to be running fine, is not recommended. It is best to address the issue promptly to prevent any potential damage to the vehicle's electronic systems and ensure optimal performance.

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