AutoCodes – Chevrolet – B1101 Chevrolet

B1101 Chevrolet Code - Battery Voltage Too High

Quick Answer

When the ignition switch is turned to ON, the Sensing and Diagnostic Module (SDM) will perform turn-on test to diagnose critical malfunctions within SDM itself. Common causes include Faulty Sensing and Diagnostic Module (SDM), Sensing and Diagnostic Module harness is open or shorted, Sensing and Diagnostic 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: B1101 Chevrolet indicates Battery Voltage Too High.
Common causes: Common causes include Faulty Sensing and Diagnostic Module (SDM), Sensing and Diagnostic Module harness is open or shorted, Sensing and Diagnostic 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 3,386

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

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Table of contents Created and updated by William Orellana on Mar 22, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1101 Chevrolet Description

When the ignition switch is turned to ON, the Sensing and Diagnostic Module (SDM) will perform turn-on test to diagnose critical malfunctions within SDM itself.
Upon passing these test ignition and deployment loop voltages are measured to ensure that they are within their normal voltage ranges. The SDM monitors the voltages at the driver low and the passenger low to detect shorts to ground or voltage in the deploy loops.
The SDM checks the wiring connection to each inflator by letting the infinitesimal current flow through the internal circuit and verify the resistance. But if the voltage is out of range, SDM is unable to check the airbag system properly.

OBDII Code B1101 Chevrolet - Battery Voltage Too High - AutoCodes.com — B1101 Chevrolet Code - Battery Voltage Too High

What does this mean?

What are the Possible Causes of the DTC B1101 Chevrolet?

Faulty Sensing and Diagnostic Module (SDM)
Sensing and Diagnostic Module harness is open or shorted
Sensing and Diagnostic Module circuit poor electrical connection

How to Fix the DTC B1101 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 is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1101 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.

Need more information about the B1101 Chevrolet code?

Need more information on how to fix the B1101 Chevrolet code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1101 Chevrolet code diagnosed by a professional: Find a repair shop in your area

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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 B1101 Chevrolet Code

1. What are common symptoms of OBDII code B1101 - Battery Voltage Too High in a Chevrolet?

- Common symptoms include the battery warning light illuminated on the dashboard, erratic electrical system behavior, and possible issues with starting the vehicle.

2. What can cause OBDII code B1101 to trigger in a Chevrolet?

- Possible causes of B1101 include a faulty voltage regulator, a malfunctioning alternator, a short circuit in the electrical system, or a problem with the battery itself.

3. How can I diagnose the source of OBDII code B1101 in my Chevrolet?

- To diagnose B1101, you can use a multimeter to check the battery voltage, inspect the alternator for proper functioning, and perform a visual inspection for any damaged wiring or connectors.

4. Can driving with OBDII code B1101 - Battery Voltage Too High damage my Chevrolet?

- Continuously driving with a high voltage condition can potentially damage electronic components in your Chevrolet, including the battery, alternator, and various sensors.

5. How can I clear OBDII code B1101 from my Chevrolet's system?

- Clearing the B1101 code can be done using an OBDII scanner that has the capability to reset fault codes. However, it is recommended to address and fix the underlying issue first.

6. Is it safe to continue driving my Chevrolet with OBDII code B1101 present?

- It is not recommended to drive your Chevrolet with the B1101 code active, as it indicates a potential issue with the electrical system that can lead to further problems if left unresolved.

7. What are some DIY repair tips for fixing OBDII code B1101 in a Chevrolet?

- DIY repair tips include checking and cleaning battery terminals, inspecting and replacing damaged wiring, testing the alternator output, and ensuring the voltage regulator is functioning correctly.

8. Can a weak battery cause OBDII code B1101 to trigger in a Chevrolet?

- Yes, a weak or failing battery can cause the voltage in the electrical system to be too high, triggering the B1101 code in a Chevrolet.

9. How much does it typically cost to repair OBDII code B1101 in a Chevrolet?

- The cost of repairing B1101 can vary depending on the root cause of the issue. It can range from a simple DIY fix like cleaning battery terminals to more expensive repairs involving the alternator or voltage regulator.

10. Will disconnecting the battery reset OBDII code B1101 in a Chevrolet?

- Disconnecting the battery may temporarily clear the code, but it is not a permanent solution as the underlying issue causing B1101 will still need to be addressed to prevent the code from reappearing.