AutoCodes – GMC – B0981 GMC

B0981 GMC Code - Transmission Winter Mode Switch Short to Ground

Quick Answer

The Powertrain Control Module (PCM) monitors the Transmission Winter Mode Switch. Common causes include Faulty Transmission Winter Mode Switch, Transmission Winter Mode Switch harness is open or shorted, Transmission Winter Mode 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: B0981 GMC indicates Transmission Winter Mode Switch Short to Ground.
Common causes: Common causes include Faulty Transmission Winter Mode Switch, Transmission Winter Mode Switch harness is open or shorted, Transmission Winter Mode 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 876

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 Mar 11, 2021

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B0981 GMC Description

The Powertrain Control Module (PCM) monitors the Transmission Winter Mode Switch. The PCM sets the OBDII code when the Transmission Winter Mode Switch is not to factory specifications.

OBDII Code B0981 GMC - Transmission Winter Mode Switch Short to Ground - AutoCodes.com — B0981 GMC Code - Transmission Winter Mode Switch Short to Ground

What does this mean?

What are the Possible Causes of the DTC B0981 GMC?

Faulty Transmission Winter Mode Switch
Transmission Winter Mode Switch harness is open or shorted
Transmission Winter Mode Switch circuit poor electrical connection

How to Fix the DTC B0981 GMC?

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 B0981 GMC 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 B0981 GMC Code

1. What are the common symptoms of OBDII code B0981 GMC (Transmission Winter Mode Switch Short to Ground)?

The common symptoms include the transmission being stuck in a specific mode, the winter mode switch not functioning properly, and the Check Engine Light being illuminated.

2. What are some possible causes of OBDII code B0981 GMC?

Possible causes of this code include a short to ground in the transmission winter mode switch circuit, damaged wiring or connectors in the circuit, or a malfunctioning winter mode switch.

3. How can I diagnose the OBDII code B0981 GMC?

Diagnosing this code typically involves using a scan tool to read the trouble codes, checking the winter mode switch circuit for shorts to ground, inspecting wiring and connectors for damage, and testing the winter mode switch for proper functionality.

4. Can I still drive my vehicle with OBDII code B0981 GMC?

It is not recommended to drive your vehicle with this code present, as it can lead to transmission issues and affect the performance and safety of your vehicle. It is best to address the issue promptly.

5. How can I repair OBDII code B0981 GMC?

Repairing this code may involve repairing or replacing damaged wiring or connectors in the transmission winter mode switch circuit, replacing the winter mode switch if faulty, and clearing the trouble codes with a scan tool.

6. Will OBDII code B0981 GMC affect my vehicle's fuel efficiency?

While this code may not directly impact fuel efficiency, it is essential to address it promptly to prevent any potential transmission problems that could affect overall vehicle performance and efficiency.

7. How much does it typically cost to repair OBDII code B0981 GMC?

The cost of repairing this code can vary depending on the extent of the issue, parts needed for replacement, and labor costs. It is recommended to consult with a professional mechanic for an accurate estimate.

8. Can OBDII code B0981 GMC be a recurring issue?

If the root cause of the code is not properly addressed during repairs, it is possible for OBDII code B0981 to recur. Thorough diagnosis and correct repairs are essential to prevent the issue from coming back.

9. Is it safe to reset the trouble codes related to OBDII code B0981 GMC without fixing the underlying issue?

It is not recommended to simply reset the trouble codes without addressing the root cause of the problem, as this may lead to ongoing issues and potential safety hazards. It is best to diagnose and repair the issue first.

10. How can I prevent OBDII code B0981 GMC from occurring in the future?

To prevent this code from occurring in the future, it is essential to perform regular vehicle maintenance, including checking the transmission winter mode switch circuit for any signs of damage or wear, and addressing any issues promptly.