AutoCodes – Generic – B1981

B1981 Code - Memory Off Switch Circuit Short to Battery

Quick Answer

The Body Control Module (BCM) monitors the Memory Off Switch. Common causes include Faulty Memory Off Switch, Memory Off Switch harness is open or shorted, Memory Off Switch 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: B1981 indicates Memory Off Switch Circuit Short to Battery.
Common causes: Common causes include Faulty Memory Off Switch, Memory Off Switch harness is open or shorted, Memory Off Switch 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 7,101

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 Aug 02, 2019

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1981 Description

The Body Control Module (BCM) monitors the Memory Off Switch. The BCM sets the OBDII code when the Memory Off Switch is not to factory specifications.

OBDII Code B1981 - Memory Off Switch Circuit Short to Battery - AutoCodes.com — B1981 Code - Memory Off Switch Circuit Short to Battery

What does this mean?

What are the Possible Causes of the DTC B1981?

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

How to Fix the DTC B1981?

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 B1981 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 B1981 code?

Need more information on how to fix the B1981 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1981 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1981 Chrysler — Power Liftgate Latch Control 1 Circuit High
B1981 Dodge — Power Liftgate Latch Control 1 Circuit High
B1981 Jeep — Power Liftgate Latch Control 1 Circuit High
B1981 RAM — Power Liftgate Latch Control 1 Circuit High

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 B1981 Code

1. What are the common symptoms of OBDII code B1981 (Memory Off Switch Circuit Short to Battery)?

The common symptoms of B1981 include inoperative memory settings for seats, mirrors, and radio, as well as potential draining of the vehicle's battery.

2. What are the possible causes of OBDII code B1981?

The possible causes of code B1981 are a short circuit in the memory off switch circuit, a faulty memory off switch, or damaged wiring related to the memory off switch.

3. How can I diagnose the issue causing OBDII code B1981?

To diagnose the issue, you can start by checking the memory off switch and its wiring for any visible damage. Use a multimeter to test the switch and circuit for continuity and shorts.

4. Can a DIYer repair OBDII code B1981 at home?

Yes, a DIYer can repair B1981 at home by replacing the faulty memory off switch or repairing the damaged wiring. However, it's essential to have basic knowledge of automotive electrical systems.

5. Is it safe to continue driving with OBDII code B1981 present?

It is generally safe to drive with code B1981, but you may experience inconvenience due to the loss of memory settings. However, it's advisable to address the issue promptly to prevent further electrical problems.

6. How much does it typically cost to repair OBDII code B1981 at a mechanic's shop?

The cost of repairing B1981 at a mechanic's shop can vary depending on the labor rates and parts needed. On average, the repair cost can range from $100 to $300.

7. Can OBDII code B1981 be triggered by a loose battery connection?

While unlikely, a loose battery connection could potentially cause intermittent issues with the memory off switch circuit, leading to the triggering of code B1981.

8. Are there any preventive measures to avoid OBDII code B1981 from occurring?

Regularly inspecting the memory off switch and its wiring for any signs of wear or damage can help prevent the occurrence of code B1981. Additionally, avoiding water damage to the switch can be beneficial.

9. Will resetting the OBDII codes make OBDII code B1981 disappear permanently?

Resetting the codes may temporarily clear the B1981 code, but if the underlying issue with the memory off switch circuit persists, the code is likely to reappear after driving the vehicle for some time.

10. Can a failing alternator cause OBDII code B1981 to appear?

While a failing alternator is not a direct cause of code B1981, electrical issues stemming from alternator problems could potentially lead to issues with the memory off switch circuit, triggering the code.