AutoCodes – Chevrolet – B1420 Chevrolet

B1420 Chevrolet 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 Chevrolet 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.

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Code Popularity 18,331

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Apr 09, 2019

Description
Possible Causes
How To Fix
Tech Notes ▶
Cost to Diagnose
FAQs
Comments
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Code B1420 Chevrolet 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 Chevrolet - Device Voltage Circuit - AutoCodes.com — B1420 Chevrolet Code - Device Voltage Circuit

What does this mean?

What are the Possible Causes of the DTC B1420 Chevrolet?

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 Chevrolet?

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 does this mean?

Code Tech Notes

User Submitted Video

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1420 Chevrolet 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 Chevrolet Code

1. What are the common symptoms of OBDII code B1420 Device Voltage Circuit in a Chevrolet?

The common symptoms include issues with the vehicle's electrical system, such as flickering lights, radio malfunction, or problems with power windows.

2. What are the possible causes of OBDII code B1420 in a Chevrolet?

Possible causes of code B1420 Device Voltage Circuit include a faulty battery, damaged wiring, a defective alternator, or a malfunctioning device connected to the circuit.

3. How can I diagnose the cause of OBDII code B1420 in my Chevrolet?

To diagnose the issue, you can use a multimeter to check the voltage in the circuit, inspect the wiring for any visible damage, and test the battery and alternator for proper functioning.

4. Can I drive my Chevrolet with OBDII code B1420 Device Voltage Circuit?

It is not recommended to drive your vehicle with code B1420 as it can lead to further electrical problems and potential safety hazards. It's best to address the issue promptly.

5. How can I repair OBDII code B1420 in my Chevrolet?

Repairing code B1420 may involve replacing a faulty battery, repairing damaged wiring, or fixing issues with the alternator. It's recommended to consult a professional mechanic for proper diagnosis and repair.

6. Can a DIYer fix OBDII code B1420 in a Chevrolet?

While some DIYers may be able to address simple issues like checking wiring connections, diagnosing and repairing code B1420 may require advanced knowledge and tools best handled by a professional mechanic.

7. Is OBDII code B1420 an expensive repair for a Chevrolet?

The cost of repairing code B1420 can vary depending on the underlying issue causing the fault. It's best to get a diagnosis from a qualified mechanic to determine the exact repair cost for your Chevrolet.

8. Can a dead battery cause OBDII code B1420 in a Chevrolet?

Yes, a dead or faulty battery can trigger code B1420 as it can cause voltage irregularities in the device circuit. It's important to ensure the battery is functioning properly to prevent this code.

9. What other OBDII codes may be related to B1420 in a Chevrolet?

Other related OBDII codes that may be triggered alongside B1420 include codes related to battery voltage irregularities, circuit malfunctions, or communication errors within the electrical system.

10. Will resetting the OBDII codes clear B1420 in a Chevrolet?

Resetting the OBDII codes may temporarily clear code B1420, but if the underlying issue causing the fault is not addressed, the code is likely to reappear. It's important to diagnose and fix the root cause of the problem.